staging: bcm2835-camera: Replace 'uint32_t' with kernel type u32

This patch fixes the checkpatch.pl issue:
CHECK: Prefer kernel type 'u32' over 'uint32_t'
Signed-off-by: NNarcisa Ana Maria Vasile <narcisaanamaria12@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.h

@@ -59,7 +59,7 @@ struct bm2835_mmal_dev {
 	unsigned int		  manual_shutter_speed;
 	bool			  exp_auto_priority;
 	bool manual_iso_enabled;
-	uint32_t iso;
+	u32 iso;
 
 	/* allocated mmal instance and components */
 	struct vchiq_mmal_instance   *instance;