msm: clock-local: Consolidate definitions of clk_ops

Move clk_ops_rcg and clk_ops_branch into clock-local.c and stop
exporting a handful of local clock functions to arch specific
drivers. Only expose the clk_ops structs.

This cuts down on the lines of code and discourages use of the
clock-local code outside of clock-local.c.

Change-Id: Iba248a4d11714b91e945bb1846a42924d1d4f8db
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>