sensors/calibration: use params in DF wrappers

Instead of using a uORB topic with the calibration values published in
sensors and consumed by the DriverFramework driver wrappers, let's just
use the the params directly. This is quite a rough change and needs
definitely some cleanup and refactoring.

src/drivers/drv_accel.h

@@ -42,7 +42,6 @@
 
 #include <stdint.h>
 #include <sys/ioctl.h>
-#include <uORB/topics/accel_calibration.h>
 
 #include "drv_sensor.h"
 #include "drv_orb_dev.h"
@@ -55,6 +54,15 @@
 #include <uORB/topics/sensor_accel.h>
 #define accel_report sensor_accel_s
 
+/** accel scaling factors; Vout = Vscale * (Vin + Voffset) */
+struct accel_calibration_s {
+	float	x_offset;
+	float	x_scale;
+	float	y_offset;
+	float	y_scale;
+	float	z_offset;
+	float	z_scale;
+};
 /*
  * ioctl() definitions
  *

src/drivers/drv_gyro.h

@@ -42,7 +42,6 @@
 
 #include <stdint.h>
 #include <sys/ioctl.h>
-#include <uORB/topics/gyro_calibration.h>
 
 #include "drv_sensor.h"
 #include "drv_orb_dev.h"
@@ -55,6 +54,15 @@
 #include <uORB/topics/sensor_gyro.h>
 #define gyro_report sensor_gyro_s
 
+/** gyro scaling factors; Vout = (Vin * Vscale) + Voffset */
+struct gyro_calibration_s {
+	float	x_offset;
+	float	x_scale;
+	float	y_offset;
+	float	y_scale;
+	float	z_offset;
+	float	z_scale;
+};
 
 /*
  * ioctl() definitions

src/drivers/drv_mag.h

@@ -40,7 +40,6 @@
 
 #include <stdint.h>
 #include <sys/ioctl.h>
-#include <uORB/topics/mag_calibration.h>
 
 #include "drv_sensor.h"
 #include "drv_orb_dev.h"
@@ -53,6 +52,15 @@
 #include <uORB/topics/sensor_mag.h>
 #define mag_report sensor_mag_s
 
+/** mag scaling factors; Vout = (Vin * Vscale) + Voffset */
+struct mag_calibration_s {
+	float	x_offset;
+	float	x_scale;
+	float	y_offset;
+	float	y_scale;
+	float	z_offset;
+	float	z_scale;
+};
 
 /*
  * ioctl() definitions