clk: qcom: Update ops for esc clock source

Some of the display panels requires various
escape clock frequencies for its operation.
Add support for the same by update esc clock
ops to clk_esc_ops.

Change-Id: I50cb79863cfdf880ba72e73a98905ecd87a08474
Signed-off-by: Amit Nischal <anischal@codeaurora.org>