ARM: dts: msm: specify SPI configuration for msmfalcon.

Initial support for all BLSP SPIs with default configuration
and disabled state such that clients can overwrite and enable
respective SPI instance as per need.

Change-Id: Ia60fc3ecb5c2aba19effe1c8242f2d89fdef3ebd
Signed-off-by: Mukesh Kumar Savaliya <msavaliy@codeaurora.org>