staging: unisys: include: Wrap macro argument in parenthesis

Addresses checkpatch check by wrapping macro argument in parenthesis.
Signed-off-by: David Binder <david.binder@unisys.com>
Signed-off-by: David Kershner <david.kershner@unisys.com>
Reviewed-by: Tim Sell <timothy.sell@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/unisys/include/channel.h

@@ -32,7 +32,7 @@
  */
 #define __SUPERVISOR_CHANNEL_H__
 
-#define SIGNATURE_16(A, B) ((A) | (B << 8))
+#define SIGNATURE_16(A, B) ((A) | ((B) << 8))
 #define SIGNATURE_32(A, B, C, D) \
 	(SIGNATURE_16(A, B) | (SIGNATURE_16(C, D) << 16))
 #define SIGNATURE_64(A, B, C, D, E, F, G, H) \