fbdev: omap2: omapfb: fix boolreturn.cocci warnings

drivers/video/fbdev/omap2/omapfb/omapfb-main.c:290:9-10: WARNING: return of 0/1 in function 'cmp_var_to_colormode' with return type bool

 Return statements in functions returning bool should use
 true/false instead of 1/0.
Generated by: scripts/coccinelle/misc/boolreturn.cocci

Fixes: 7378f11498 ("media: omap2: omapfb: allow building it with COMPILE_TEST")
Signed-off-by: kbuild test robot <fengguang.wu@intel.com>
Cc: Mauro Carvalho Chehab <m.chehab@samsung.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>

drivers/video/fbdev/omap2/omapfb/omapfb-main.c

@@ -287,7 +287,7 @@ static bool cmp_var_to_colormode(struct fb_var_screeninfo *var,
 			var->red.length == 0 ||
 			var->blue.length == 0 ||
 			var->green.length == 0)
-		return 0;
+		return false;
 
 	return var->bits_per_pixel == color->bits_per_pixel &&
 		cmp_component(&var->red, &color->red) &&