leds: leds-qpnp: Add missing break in switch statement

MPP Led call is missing a "break" in qpnp_led_set switch
statment.  Add this in so that functions reserved for
differnet LED types are not called.

Change-Id: I7d8e76927db8cc3bc7d0d7c300bdbf886d0c0714
Signed-off-by: Amy Maloche <amaloche@codeaurora.org>