ARM: msm: Remove custom clk_set_{max,min}_rate() API

There are no users of this API anymore so let's just remove it.
If a need arises in the future we can extend the common clock API
to handle it.

Acked-by: Saravana Kannan <skannan@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>