ARM: dts: msm: Add default pinctrl state for sm8150 HSUART

when device gets probed, kernel picks up default state and sets
pinctrl to that configuration. Since default state contains UART
functionality, it remains high which consumes power.

To resolve power leakage issue, add additional active state to
configure UART functionality and keep default state for the GPIO
state during probe.

Change-Id: Ia5343d709ecc2816ff35edf3c00c60804f6cfc58
Signed-off-by: Mitul Golani <mgolani@codeaurora.org>