staging: android: uapi: fix coding style

This patch fix checkpatch.pl warning and errors.
Signed-off-by: Seunghun Lee <waydi1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/android/uapi/ion.h

@@ -50,7 +50,7 @@ enum ion_heap_type {
 #define ION_HEAP_CARVEOUT_MASK		(1 << ION_HEAP_TYPE_CARVEOUT)
 #define ION_HEAP_TYPE_DMA_MASK		(1 << ION_HEAP_TYPE_DMA)
 
-#define ION_NUM_HEAP_IDS		sizeof(unsigned int) * 8
+#define ION_NUM_HEAP_IDS		(sizeof(unsigned int) * 8)
 
 /**
  * allocation flags - the lower 16 bits are used by core ion, the upper 16