[ARM] pxa: add base support for Marvell PXA910

arch/arm/Kconfig

arch/arm/mach-mmp/Kconfig

arch/arm/mach-mmp/Makefile

arch/arm/mach-mmp/common.h

arch/arm/mach-mmp/include/mach/cputype.h

arch/arm/mach-mmp/include/mach/devices.h

arch/arm/mach-mmp/include/mach/irqs.h

arch/arm/mach-mmp/include/mach/mfp-pxa910.h

arch/arm/mach-mmp/include/mach/pxa910.h

arch/arm/mach-mmp/include/mach/regs-apbc.h

arch/arm/mach-mmp/pxa910.c

arch/arm/plat-pxa/include/plat/mfp.h