ARM: dts: msm: Change pull bias for touchscreen I2C node

When touchscreen is in sleep state, GPIOs are still in use.
Change touchscreen I2C pull bias in sleep state to remove
current leak.

Change-Id: I0112eb6944579c6b10861f19376cf8edccd73891
Signed-off-by: Alex Sarraf <asarraf@codeaurora.org>