ARM: dts: msm: Configure BLSP2 UART0 instance for MSM8953

Configure BLSP2 UART0 instance for MSM8953 with default
status set to disabled. Client needs to enable this
instance as per usecase.

New features like BT, can have future use cases enabled.

Change-Id: I29fbad6ead6ba900defd24130e7b382e7fd94c41
Signed-off-by: Shrey Vijay <shreyv@codeaurora.org>