staging: sm750fb: Change 'x != NULL' to 'x'

Changes the explicit comparison to NULL from 'x != NULL' to 'x'. Issue detected
by checkpatch.

Signed-off-by: Rehas Sachdeva <aquannie@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/sm750fb/sm750.c

@@ -1176,7 +1176,7 @@ static int __init lynxfb_setup(char *options)
 		else {
 			strcat(tmp, opt);
 			tmp += strlen(opt);
-			if (options != NULL)
+			if (options)
 				*tmp++ = ':';
 			else
 				*tmp++ = 0;