ARM: dts: msm: add Tri-color RGB LEDs on pmicobalt

Add RGB LEDs that are present on pmicobalt. These LEDs are used
for applications like notification of charging indicator and
other user defined applications.

Since LPG channels 3,4 and 5 are assigned for Blue, Green and
Red LEDs on pmicobalt, keep them enabled in device tree.

CRs-Fixed: 1037821
Change-Id: I1a40bbe46e689d8c98f31cfef3a6743856288127
Signed-off-by: Subbaraman Narayanamurthy <subbaram@codeaurora.org>