Add a driver for the global clock controller found on IPQ8064 based
platforms. This should allow most non-multimedia device drivers to probe
and control their clocks.

This is currently missing clocks for USB HSIC and networking devices.
Signed-off-by: NKumar Gala <galak@codeaurora.org>
Signed-off-by: NAndy Gross <agross@codeaurora.org>
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>