MIPS: Lemote 2F, Malta: Fix build warning

Since 5ada28bf ["led-class: always
implement blinking"] LEDS_CLASS=m is no longer valid so change the setting
from m to y.

Signed-off-by: Wanlong Gao <wanlong.gao@gmail.com>
To: david.woodhouse@intel.com
To: akpm@linux-foundation.org
To: mingo@elte.hu
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/2276/


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