clk: qcom: clk-alpha-pll: Add additional configuration support for PLLs

On upcoming targets, due to certain limitations and design changes,
the multimedia and NPU PLLs are no longer going to be configured by
the bootloader. This leaves it up to the HLOS clock drivers to
configure these PLLs prior to enabling them.

Change-Id: I8e70426d2ee7343160136d526810441e2d9011b8
Signed-off-by: Deepak Katragadda <dkatraga@codeaurora.org>