clk: qcom: clk-alpha-pll: Add support for Agera print registers

Agera PLL print registers are required to get the PLL values
from the debugfs, thus add support for the same.

Change-Id: I4b708958e1125ce7e8eab945a3c15113739230d4
Signed-off-by: Taniya Das <tdas@codeaurora.org>