ARM: dts: msm: Add clk-ctrl-xfer flag to control clocks

Add support for configuration of clock
control event. Now the clock's state may
be set by power management suspend/resume
calls (as before) or by a transfer's begining
and ending.

CRs-Fixed: 592435
Change-Id: I480cd2b50f695a3ef86b3f673a35aee53b7dbad8
Signed-off-by: Sana Venkat Raju <c_vsana@codeaurora.org>