platform/x86: acerhdf: Cleanup str_starts_with()

Since there is already a generic function strstarts() that check if a
string starts with a given prefix, cleanup str_starts_with().
Signed-off-by: Wei Li <liwei391@huawei.com>
Acked-by: Peter Kästle <peter@piie.net>
Link: https://lore.kernel.org/r/20220326020249.3266561-1-liwei391@huawei.comReviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

drivers/platform/x86/acerhdf.c

@@ -584,21 +584,6 @@ static struct platform_driver acerhdf_driver = {
 	.remove = acerhdf_remove,
 };
 
-/* checks if str begins with start */
-static int str_starts_with(const char *str, const char *start)
-{
-	unsigned long str_len = 0, start_len = 0;
-
-	str_len = strlen(str);
-	start_len = strlen(start);
-
-	if (str_len >= start_len &&
-			!strncmp(str, start, start_len))
-		return 1;
-
-	return 0;
-}
-
 /* check hardware */
 static int __init acerhdf_check_hardware(void)
 {
@@ -651,9 +636,9 @@ static int __init acerhdf_check_hardware(void)
 		 * check if actual hardware BIOS vendor, product and version
 		 * IDs start with the strings of BIOS table entry
 		 */
-		if (str_starts_with(vendor, bt->vendor) &&
-				str_starts_with(product, bt->product) &&
-				str_starts_with(version, bt->version)) {
+		if (strstarts(vendor, bt->vendor) &&
+		    strstarts(product, bt->product) &&
+		    strstarts(version, bt->version)) {
 			found = 1;
 			break;
 		}