msm: krait-l2-accessors: Remove workaround for 8064 Krait errata

This workaround can be removed in favor of an alternate solution
implemented in the power-collapse path which backs up the
corruptable L2CPUCPMR and L2CPMR registers before L2 power-collase
and restores them afterwards.

CRs-Fixed: 400700
Signed-off-by: Matt Wagantall <mattw@codeaurora.org>
(cherry picked from commit aa48fc35e051363b997bd33928796e3e84d08d88)

Signed-off-by: Ram Kumar Chakravarthy Chebathini <rcheba@codeaurora.org>

Change-Id: I4a9962d95a4a7a835042dde91eee6b89754ea86b
Signed-off-by: Neha Pandey <nehap@codeaurora.org>