clk: qcom: rpmcc: Add snapshot of RPMCC clock driver

Add the rpmcc clock driver snapshot from msm-4.14
'commit 49dea5ea6d8a(clk: qcom: clk-smd-rpm: Add qdss_clk as branch
clock for TRINKET').
Also add support for rpm clocks supported on Bengal.

Change-Id: I4d0bf2f2dca9033cc57e104bc6acd2f5c3e71ff7
Signed-off-by: Taniya Das <tdas@codeaurora.org&gt;'>