ARM: bcm2835: add mutual inclusion protection

This patch adds mutual inclusion protection for the rpi firmware header.

Cc: Eric Anholt <[e-mail]>
Cc: Stephen Warren <[e-mail]>
Signed-off-by: Alexander Aring <[e-mail]>
Signed-off-by: Florian Fainelli <[e-mail]>

include/soc/bcm2835/raspberrypi-firmware.h

···
  * published by the Free Software Foundation.
  */
 
+#ifndef __SOC_RASPBERRY_FIRMWARE_H__
+#define __SOC_RASPBERRY_FIRMWARE_H__
+
 #include <linux/types.h>
 #include <linux/of_device.h>
 
···
 int rpi_firmware_property_list(struct rpi_firmware *fw,
 			       void *data, size_t tag_size);
 struct rpi_firmware *rpi_firmware_get(struct device_node *firmware_node);
+
+#endif /* __SOC_RASPBERRY_FIRMWARE_H__ */