FROMGIT: coresight: etm4x: Safe access for TRCQCLTR

ETM4x implements TRCQCLTR only when the Q elements are supported
and the Q element filtering is supported (TRCIDR0.QFILT). Access
to the register otherwise could be fatal. Fix this by tracking the
availability, like the others.

Fixes: f188b5e7 ("coresight: etm4x: Save/restore state across CPU low power states")
Reported-by: Yabin Cui <yabinc@google.com>
Reviewed-by: Mike Leach <mike.leach@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Tested-by: Yabin Cui <yabinc@google.com>
Link: https://lore.kernel.org/r/20240412142702.2882478-4-suzuki.poulose@arm.com

Bug: 335234033
(cherry picked from commit 46bf8d7c
 https://git.kernel.org/pub/scm/linux/kernel/git/coresight/linux.git


 next)
Change-Id: Id848fa14ba8003149f76b5ca54562593f6164150
Signed-off-by: Yabin Cui <yabinc@google.com>