staging: vc04_services: add parenthesis to macros

vchi_cfg.h: fix checkpatch ERROR: Macros with complex values should be enclosed in parenthesis
Signed-off-by: Haim Daniel <haimdaniel@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vc04_services/interface/vchi/vchi_cfg.h

@@ -173,7 +173,7 @@
  * under the carpet. */
 #if VCHI_RX_MSG_QUEUE_SIZE < (VCHI_MAX_MSG_SIZE/16 + 1) * VCHI_NUM_READ_SLOTS
 #  undef VCHI_RX_MSG_QUEUE_SIZE
-#  define VCHI_RX_MSG_QUEUE_SIZE (VCHI_MAX_MSG_SIZE/16 + 1) * VCHI_NUM_READ_SLOTS
+#  define VCHI_RX_MSG_QUEUE_SIZE ((VCHI_MAX_MSG_SIZE/16 + 1) * VCHI_NUM_READ_SLOTS)
 #endif
 
 /* How many bulk transmits can we have pending. Once exhausted, vchi_bulk_queue_transmit