clk: qcom: alpha-pll: Remove useless read from set rate

PLL_MODE read in fabia set rate is not required, thus remove the same.

Signed-off-by: Taniya Das <tdas@codeaurora.org>
Link: https://lkml.kernel.org/r/1573812304-24074-2-git-send-email-tdas@codeaurora.org


Signed-off-by: Stephen Boyd <sboyd@kernel.org>