ARM: dts: msm: Configure SPI_2, SPI_4 and UART2 instance for MSM8909

Configure SPI_2, SPI_4 and UART2 instances for MSM8909 with default
status set to disabled. Client need to enable these instances as
per usecase.

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

Change-Id: I5e59935eb8b4d412429d6629ba3c60453de62c44
Signed-off-by: Shrey Vijay <shreyv@codeaurora.org>