clk: qcom: Update ops for esc clock source

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

Change-Id: I3fe1e98bcdb15e3384fffc17089276e2257be7f3
Signed-off-by: Amit Nischal <anischal@codeaurora.org>