ARM: l2x0: only apply workaround for erratum #753970 on PL310

The workaround for PL310 erratum #753970 can lead to deadlock on systems
with an L220 cache controller.

This patch makes the workaround effective only when the cache controller
is identified as a PL310 at probe time.

Signed-off-by: Will Deacon <will.deacon@arm.com>
1 file changed