mpu9250: Adding support for MPU-9250 (and MPU-6050) accelerometer

Add support for mpu9250 accelerometer over I2C bus.

Signed-off-by: Harry Beyel <harry3b9@gmail.com>

src/i2ccmds.c

@@ -9,10 +9,7 @@
 #include "command.h"  //sendf
 #include "sched.h" //DECL_COMMAND
 #include "board/gpio.h" //i2c_write/read/setup
-
-struct i2cdev_s {
-    struct i2c_config i2c_config;
-};
+#include "i2ccmds.h"
 
 void
 command_config_i2c(uint32_t *args)
@@ -25,6 +22,12 @@ command_config_i2c(uint32_t *args)
 DECL_COMMAND(command_config_i2c,
              "config_i2c oid=%c i2c_bus=%u rate=%u address=%u");
 
+struct i2cdev_s *
+i2cdev_oid_lookup(uint8_t oid)
+{
+    return oid_lookup(oid, command_config_i2c);
+}
+
 void
 command_i2c_write(uint32_t *args)
 {