hrtimer: Revert CLOCK_MONOTONIC_RAW support

hrtimer: Revert CLOCK_MONOTONIC_RAW support

Revert commits:
69a861831082: KVM: arm/arm64: timer: Switch to CLOCK_MONOTONIC_RAW
426fad5e4009: hrtimer: Catch illegal clockids
fa428b94c8e3: hrtimer: Add support for CLOCK_MONOTONIC_RAW

Marc found out, that there are fundamental issues with that patch series
because __hrtimer_get_next_event() and hrtimer_forward() need support for
CLOCK_MONOTONIC_RAW. Nothing which is easily fixed, so revert the whole lot.

Reported-by: Marc Zyngier <marc.zyngier@arm.com>
Link: http://lkml.kernel.org/r/56D6CEF0.8060607@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>