ARM: dts: msm: Enable UART for sdm630

BLSP2 UART1 is used as transport for Bluetooth between sdm630 & wcn3990.
Enable it so that Bluetooth can be enabled on sdm630 CDP/MTP/QRD.

Change-Id: I61f300d5a8fa54172acce429ee961f7caef7d404
Signed-off-by: Rupesh Tatiya <rtatiya@codeaurora.org>