ARM: dts: msm: Update slew rate for LPI gpios in atoll

Update the slew rate and drive strength values for all
soundwire LPI gpios in atoll target as per hardware
recommendation.

Change-Id: I6a8e00f63f0dde750ba0f4bd44ca0283d013a8b8
Signed-off-by: Aditya Bavanari <abavanar@codeaurora.org>