from linux commit ce8155f7a3d5:
Perl 5.22 emits a deprecated message when "\C" is used in a regex. Perl
5.24 will disallow it altogether.
Fix it by using [A-Z] instead of \C.
>From linux adapted to U-Boot by:
Signed-off-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>