uboot-phytec

i.MX7ULP: Fix PCC register bits mask and offset issue

The offset for FRAC and the mask for PCD are not correct.
If we set FRAC, we can't get the right frequency. Fix them
to correct value.

Signed-off-by: Ye Li <ye.li@nxp.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>