opp: Call the missing clk_put() on error

Fix the clock reference counting by calling the missing clk_put() in the
error path.

Cc: v5.10 <stable@vger.kernel.org> # v5.10
Fixes: dd461cd9 ("opp: Allow dev_pm_opp_get_opp_table() to return -EPROBE_DEFER")
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>