MIPS: RB532: Replace parse_mac_addr() with mac_pton().

Signed-off-by: Daniel Walter <dwalter@google.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/7150/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>