lib/edid.c: Add missing break statement

This was flagged as CID 1229647 (MISSING_BREAK). It was
originally fixed in e211bd9, but then reverted in 1c8ee21.
Hopefully fix it for good now.

Signed-off-by: Jacob Garber <jgarber1@ualberta.ca>
Change-Id: Ib25b07b633ed02c466391050df15eaf9c36a3199
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32088
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/lib/edid.c

@@ -1002,6 +1002,7 @@ parse_extension(struct edid *out, unsigned char *x, struct edid_context *c)
 		break;
 	case 0xFF:
 		printk(BIOS_SPEW, "Manufacturer-specific extension block\n");
+		break;
 	default:
 		printk(BIOS_SPEW, "Unknown extension block\n");
 		break;