MFC r353524-r353527, r353534

r353524:
aw_ccung: Add more debug printfs

No functional changes

r353525:
arm64: allwinner: Add new clock aw_clk_np

This is a clock type present in Allwinner H6 where the formula is :
f = fparent * N / P

r353526:
arm64: allwinner: Add aw_clk_nmm clock

This is a clock type present on Allwinner H6 where the formula is :
f = fparent * n / m0 / m1

r353527:
arm: allwinner: Disable the clock before changing it's freq

You aren't supposed to changing the freq of a clock when it is
enable so disable the clock before changing the freq and then
re-enable it.

r353534:
arm: allwinner: Add np and nmm clock file to the build