ARM: dts: msm: add support for new connection on OTST2

Add support to enable MASK3 module, in order to use new connection
on OTST2 for flash LED driver. Also, add support to deset bit for
FOLLOW_OTST2_RB when MASK3 module is enable, to prevent device
reset before flash LED will get chance to ramp down.

Change-Id: I17a09ba3b03e98fb5248b925d8dce20aaa822279
Signed-off-by: Jigarkumar Kishorkumar Zala <j_zala@codeaurora.org>