Now that we have a separate structure for timer context, make functions
generic so that they can work with any timer context, not just the
virtual timer context.  This does not change the virtual timer
functionality.
Signed-off-by: NJintack Lim <jintack@cs.columbia.edu>
Acked-by: NMarc Zyngier <marc.zyngier@arm.com>
Acked-by: NChristoffer Dall <christoffer.dall@linaro.org>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>