msys: axp-amc: update available unit info

	- extend unit list with AXP ones
	- add 0x78460 units to MSYS table
	- enable obtaining model and revision of AXP SoC
	- extend clock gating in order to control AXP units

Change-Id: I10ba89161e3b8afdf538b102f08cd86cbba021b7
Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Signed-off-by: Omri Itach <omrii@marvell.com>
Reviewed-on: http://vgitil04.il.marvell.com:8080/20553
3 files changed