clk: qcom: clk-alpha-pll: modularize alpha_pll_trion_set_rate()

Trion 5LPE set rate uses code similar to alpha_pll_trion_set_rate() but
with different registers. Modularize these by moving out latch and latch
ack bits so that we can reuse the function.

Suggested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Signed-off-by: Vinod Koul <vkoul@kernel.org>