ARM: dts: msm: Modify UART pins configurations SM8150

Modify SE13's UART and SE12's UART pin configurations for BT and console
use cases. This helps saving power.

Change-Id: I58dfe166011a75e067dc4c1abc1c8a63ab7df5d1
Signed-off-by: Mukesh Kumar Savaliya <msavaliy@codeaurora.org>