staging: sm750fb: correctly define SM750LE_REVISION_ID

check if it is already defined before defining SM750LE_REVISION_ID
again and at the same time mention correct data type.

Signed-off-by: Sudip Mukherjee <sudip@vectorindia.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/sm750fb/sm750_hw.c b/drivers/staging/sm750fb/sm750_hw.c
index ec2d499..a2b7fe2 100644
--- a/drivers/staging/sm750fb/sm750_hw.c
+++ b/drivers/staging/sm750fb/sm750_hw.c
@@ -277,7 +277,7 @@
 		case 16:
 			break;
 		case 32:
-			if(share->revid == (unsigned char)SM750LE_REVISION_ID){
+			if (share->revid == SM750LE_REVISION_ID) {
 				pr_debug("750le do not support 32bpp\n");
 				return -EINVAL;
 			}