Disable the PMIC keypad led feature for SKUG board

The SKUG board is using the MSM gpio 34 to control the keypad
led. So it is necessary to disable the PMIC keypad led feature
for SKUG board.

Change-Id: I1fbdcbc32baf8f2295a6574576d104a1d3e2a3ff
Signed-off-by: Jie Cheng <rockiec@codeaurora.org>