ARM: dts: mdm9640: Add clock nodes for apss and bimc axi

When cpu attempts idle power collapse, system hangs
randomly. The signature of the hang is a pending write
on bimc port as soon as it exits from power collapse. To
recover from this condition, we need to enable hardware clock
gating of bimc/apps axi clk only for idle spc and pc.

Change-Id: I201bb71596daec199b2c16c10325ea432bfa4d37
Signed-off-by: Girish S Ghongdemath <girishsg@codeaurora.org>