[PATCH v4 00/10] update irqchip, clocksource, clk for mmp

[Haojian Zhuang]

Changelog:
v4:
1. Remove .init_irq in mmp & mmp2 DT machine descriptor.
2. Use an argument to replace TIMER_PHYS_BASE. Now transfer virtual
address directly.
3. Merge 10th & 11th patches together. Remove the redundant changes
on drivers/clocksource/Kconfig & drivers/clocksource/Makefile.

v3:
1. Don't use include/linux/irqchip/mmp.h since we don't need to
move <mach/irqs.h> to <include/linux/irqchip/mmp.h>.
2. Move timer-mmp driver into clocksource directory & support
clocksource.
3. Support clksrc in mmp & parse all clock from DTS.

v2:
1. Avoid to include <mach/irqs.h>. Move the head file into
   include/linux/irqchip directory.
2. Avoid to include <mach/pm-pxa910.h> & <mach/pm-mmp2.h>.