fb modedb: Refactor confusing mode_option assignment

Signed-off-by: NGeert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

drivers/video/modedb.c

@@ -510,7 +510,9 @@ int fb_find_mode(struct fb_var_screeninfo *var,
 	default_bpp = 8;
 
     /* Did the user specify a video mode? */
-    if (mode_option || (mode_option = fb_mode_option)) {
+    if (!mode_option)
+	mode_option = fb_mode_option;
+    if (mode_option) {
 	const char *name = mode_option;
 	unsigned int namelen = strlen(name);
 	int res_specified = 0, bpp_specified = 0, refresh_specified = 0;