clk: qcom: clk-alpha-pll: Add support for controlling zonda pll

Zonda PLL is high frequency PLL clock generator. It supports
fine control of the digital controlled oscillator (DCO)
and clocked on rising edge of the reference.

Change-Id: I2a9726a0acbffcee1a52f5172b197bf125e60030
Signed-off-by: Vivek Aknurwar <viveka@codeaurora.org>
Signed-off-by: David Collins <collinsd@codeaurora.org>