Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Properly initialize Armada XP MP subsystem.

- correct setting of Auxiliary Control Register for MP mode
- correct setting of Auxiliarty Debug registers
- cleanup management of memory contains bootup code
- early initialization of Coherency Fabric (MP and not-MP mode)
- enable Snoop Filtering

Obtained from: Semihalf

Initialize L2 cache for Armada XP.

Obtained from: Semihalf

Enable PCI for Armada XP

Obtained from: Semihalf

Add support for Armada XP A0.

- Add functions to calculate clocks instead using hardcoded values
- Update reset and timers functions
- Update number of interrupts
- Change name of platform from db88f78100 to db78460
- Correct DRAM size and PCI IRQ routing in dts file.

Obtained from: Semihalf

Merging of projects/armv6, part 7

Add Marvell ARMADA XP support

Obtained from: Marvell, Semihalf