ARM: dts: msm: Add core/core2x clk for SSC QUP

Add core/core2x clock and SSC QUP sub system name for SA6155,
SA8155 and SA8195 to enable SSR feature and add status field
to QUP node.

Change-Id: I7b198c4eb7bcd7347a879b359a9290e4dc7f97b5
Signed-off-by: Ashish Kori <akori@codeaurora.org>