ARM: arch_timer: resurrect cntpct for MSM users

  ARM: arch_timer: resurrect cntpct for MSM users

  We have some users of the physical counter reading function, and
  they need to work when either the cp15 or mmio timers are present
  in any configuration. Bring back the functionality and expose it
  to drivers so that the RPM code and SMEM code have proper global
  timestamps to communicate with other processors.

  Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>

  ARM64: arch_timer: resurrect cntpct for MSM users

  We have some users of the physical counter reading function, and
  they need to work when either the cp15 or mmio timers are present
  in any configuration.

  Change-Id: If37d73be1a75ef33be1e2276d4fa84740d933891
  Signed-off-by: Abhimanyu Kapur <abhimany@codeaurora.org>

[joshc: combine 32-bit and 64-bit patches, fixed up trivial add/change conflict]
Signed-off-by: Josh Cartwright <joshc@codeaurora.org>
[abhimany: fixed up trivial add/change conflict]
Signed-off-by: Abhimanyu Kapur <abhimany@codeaurora.org>