clk: qcom: clk-alpha-pll: remove unused/incorrect PLL_CAL_VAL

0x44 isn't a register offset, it is the value that goes into CAL_L_VAL.

Fixes: 548a9095 ("clk: qcom: clk-alpha-pll: Add support for Trion PLLs")

Signed-off-by: Jonathan Marek <jonathan@marek.ca>