clk: mmp2: Add PLLs that are available on MMP3

There are more PLLs on MMP3 and are configured slightly differently.
Tested on a MMP3-based Dell Wyse 3020 machine.

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Link: https://lkml.kernel.org/r/20200309194254.29009-10-lkundrak@v3.sk


Signed-off-by: Stephen Boyd <sboyd@kernel.org>