fbdev: omapfb: Replace custom memparse() implementation

Our library has memparse() for parsing numbers with respective suffixes
suitable for memory sizes. Use it instead of custom implementation.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Helge Deller <deller@gmx.de>

Author: andy-shev

drivers/video/fbdev/omap/omapfb_main.c

@@ -1856,20 +1856,13 @@ static int __init omapfb_setup(char *options)
 		if (!strncmp(this_opt, "accel", 5))
 			def_accel = 1;
 		else if (!strncmp(this_opt, "vram:", 5)) {
+			unsigned long long vram;
 			char *suffix;
-			unsigned long vram;
-			vram = (simple_strtoul(this_opt + 5, &suffix, 0));
+
+			vram = memparse(this_opt + 5, &suffix);
 			switch (suffix[0]) {
 			case '\0':
 				break;
-			case 'm':
-			case 'M':
-				vram *= 1024;
-				fallthrough;
-			case 'k':
-			case 'K':
-				vram *= 1024;
-				break;
 			default:
 				pr_debug("omapfb: invalid vram suffix %c\n",
 					 suffix[0]);