fix(gicv3): incorrect impdef power down sequence

The GICR_WAKER.Sleep and GICR_WAKE.Quiescent functionality is solely
about flushing out the LPI cache and ensuring that the contents are
consistent with external memory.

Hence, as shown in GIC-700 TRM version r3p0, software must poll for
Quiescent bit only if LPIs are supported.

Change-Id: I7d69b208428e24d8a3ff30e81bd1a8ee3d0bda6e
Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>
2 files changed