Roboclaw: Temporary fix, enabling driver to run

ROMFS/px4fmu_common/init.d/airframes/50003_aion_robotics_r1_rover

@@ -58,4 +58,3 @@ param set-default PWM_MAIN_DIS1 1500
 param set-default PWM_MAIN_DIS2 1500
 param set-default PWM_MAIN_TIM0 50
 param set-default PWM_MAIN_TIM1 50
-

src/drivers/roboclaw/RoboClaw.cpp

@@ -133,7 +133,7 @@ RoboClaw::~RoboClaw()
 void RoboClaw::taskMain()
 {
 	// Make sure the Roboclaw is actually connected, so I don't just spam errors if it's not.
-	uint8_t rbuff[4];
+	uint8_t rbuff[6];
 	int err_code = _transaction(CMD_READ_STATUS, nullptr, 0, &rbuff[0], sizeof(rbuff), false, true);
 
 	if (err_code <= 0) {

src/drivers/roboclaw/roboclaw_params.c

@@ -111,4 +111,4 @@ PARAM_DEFINE_INT32(RBCLW_ADDRESS, 128);
  * @group Roboclaw driver
  * @reboot_required true
  */
-PARAM_DEFINE_INT32(RBCLW_BAUD, 2400);
+PARAM_DEFINE_INT32(RBCLW_BAUD, 57600);