feat(nxp-clk): add get_rate for s32cc_pll

Add the option to obtain the rate of an s32cc_pll object. The rate of
the PLL can be obtained regardless of its hardware state. The targeted
frequency is returned in case the PLL is off. Otherwise, the frequency
is determined based on settings found in its registers.

Change-Id: Id200d0eff149109a724eee69b063bf750d5cba2e
Signed-off-by: Ghennadi Procopciuc <ghennadi.procopciuc@nxp.com>
2 files changed