- Put all clock and control unit driver in BUS_PASS_RESOURCE except
for the DE2 CCU as it needs the main CCU to be available.
- Use BUS_PASS_CPU for a20_cpu_cfg as it makes more sense.
- For aw_syscon use SCHEDULER pass as we need it early for drivers
that attach in BUS_PASS_SUPPORTDEV
- For the rest we can use BUS_PASS_SUPPORTDEV
The old clocks are disconneted from the build since r337344.
Remove all those pseudo drivers. The only one remaining is for gmac
(the ethernet controller) so move it to sys/arm/allwinner.
While here remove a83t support from gmacclk as it is unneeded since r326114.
MFC after: 1 month