[DRIVERS] clk: Make clock lookup API selectable.

Signed-off-by: Anup Patel <anup@brainfault.org>
[ARM] versatile: Lookup device tree nodes using compatible string

Signed-off-by: Anup Patel <anup@brainfault.org>
Merge remote-tracking branch 'upstream/master' into dev_exynos4
[ARM] sun4i: Lookup device tree nodes using compatible string

Signed-off-by: Anup Patel <anup@brainfault.org>
[CORE] vcpu state is now changed by vmm_scheduler_state_change()

vmm_scheduler_state_change() was renamed from
vmm_scheduler_notify_state_change()

Signed-off-by: Anup Patel <anup@brainfault.org>
Merge remote-tracking branch 'upstream/master' into dev_exynos4