feat(nxp-clk): add get_rate for s32cc_fixed_div

The get rate callback is needed for s32cc_fixed_div to allow the
frequency compilation for modules attached to a fixed divider like
LINFLEXD_CLK.

Change-Id: Ibc3e52f7f1127bba0dd793be0a26bdff15260824
Signed-off-by: Ghennadi Procopciuc <ghennadi.procopciuc@nxp.com>
1 file changed