src/platforms: move all headers to platforms/common/include/px4_platform_common

and remove the px4_ prefix, except for px4_config.h.

command to update includes:
for k in app.h atomic.h cli.h console_buffer.h defines.h getopt.h i2c.h init.h log.h micro_hal.h module.h module_params.h param.h param_macros.h posix.h sem.h sem.hpp shmem.h shutdown.h tasks.h time.h workqueue.h; do for i in $(grep -rl 'include <px4_'$k src platforms boards); do sed -i 's/#include <px4_'$k'/#include <px4_platform_common\/'$k/ $i; done; done
for in $(grep -rl 'include <px4_config.h' src platforms boards); do sed -i 's/#include <px4_config.h/#include <px4_platform_common\/px4_config.h'/ $i; done

Transitional headers for submodules are added (px4_{defines,log,time}.h)

platforms/common/include/px4_platform_common/shmem.h

@@ -0,0 +1,82 @@
+/****************************************************************************
+ *
+ * Copyright (c) 2015 Ramakrishna Kintada. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name PX4 nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+#pragma once
+
+#include <parameters/param.h>
+
+#define MAX_SHMEM_PARAMS 2000 //MAP_SIZE - (LOCK_SIZE - sizeof(struct shmem_info))
+
+#define PARAM_BUFFER_SIZE (MAX_SHMEM_PARAMS / 8 + 1)
+
+struct shmem_info {
+	union param_value_u params_val[MAX_SHMEM_PARAMS];
+	unsigned char krait_changed_index[MAX_SHMEM_PARAMS / 8 + 1]; /*bit map of all params changed by krait*/
+	unsigned char adsp_changed_index[MAX_SHMEM_PARAMS / 8 + 1]; /*bit map of all params changed by adsp*/
+
+#ifdef __PX4_NUTTX
+};
+#else
+} __attribute__((packed));
+#endif
+
+#if (defined(__PX4_POSIX_EXCELSIOR) || defined(__PX4_QURT_EXCELSIOR))
+#define MAP_ADDRESS    0x861FC000
+#else
+#define MAP_ADDRESS	0xfbfc000
+#endif
+#define MAP_SIZE 	16384
+#define MAP_MASK 	(MAP_SIZE - 1)
+
+#define LOCK_OFFSET	0
+#define LOCK_SIZE	4
+#define LOCK_MEM        1
+#define UNLOCK_MEM      2
+
+#define TYPE_MASK 	0x1
+
+extern bool handle_in_range(param_t);
+
+#ifdef __PX4_QURT
+extern struct shmem_info *shmem_info_p;
+
+int get_shmem_lock(const char *caller_file_name, int caller_line_number);
+void release_shmem_lock(const char *caller_file_name, int caller_line_number);
+void init_shared_memory(void);
+
+void copy_params_to_shmem(const param_info_s *param_info_base);
+#endif
+
+void update_to_shmem(param_t param, union param_value_u value);
+int update_from_shmem(param_t param, union param_value_u *value);
+void update_index_from_shmem(void);