clean up, change SPI2 clock back to 12MHz and remove debug prints

src/drivers/boards/px4fmu-v4/board_config.h

@@ -122,14 +122,18 @@ __BEGIN_DECLS
 #define PX4_SPI_BUS_RAMTRON	2
 
 /* Use these in place of the spi_dev_e enumeration to select a specific SPI device on SPI1 */
-//#define PX4_SPIDEV_FRAM			0
 #define PX4_SPIDEV_GYRO			1
 #define PX4_SPIDEV_ACCEL_MAG	2
-#define PX4_SPIDEV_BARO			3
 #define PX4_SPIDEV_MPU			4
 #define PX4_SPIDEV_HMC			5
 #define PX4_SPIDEV_ICM			6
 
+/* onboard MS5611 and FRAM are both on bus SPI2
+ * spi_dev_e:SPIDEV_FLASH has the value 2 and is used in the NuttX ramtron driver
+ * use 3 for the barometer to differentiate
+ */
+#define PX4_SPIDEV_BARO			3
+
 /* I2C busses */
 #define PX4_I2C_BUS_EXPANSION	1
 #define PX4_I2C_BUS_LED			PX4_I2C_BUS_EXPANSION

src/drivers/boards/px4fmu-v4/px4fmu_init.c

@@ -301,11 +301,12 @@ __EXPORT int nsh_archinitialize(void)
 		return -ENODEV;
 	}
 
-	/* Default SPI2 to 37.5 MHz (40 MHz rounded to nearest valid divider, F4 max)
-	 * and de-assert the known chip selects. */
+    /* Default SPI2 to 12MHz and de-assert the known chip selects.
+     * MS5611 has max SPI clock speed of 20MHz
+     */
 
-	// XXX start with 10.4 MHz in FRAM usage and go up to 37.5 once validated
-	SPI_SETFREQUENCY(spi2, 1 * 1000 * 1000);
+    // XXX start with 10.4 MHz and go up to 20 once validated
+    SPI_SETFREQUENCY(spi2, 12 * 1000 * 1000);
 	SPI_SETBITS(spi2, 8);
 	SPI_SETMODE(spi2, SPIDEV_MODE3);
 	SPI_SELECT(spi2, SPIDEV_FLASH, false);