fix(cpus): fix the rev-var for Cortex-A710

Update the revision and variant information in the
errata ABI file, cortex_A710.S file for erratum ID - 2058056
and erratum ID - 2055002 to match the revision and variant
in the latest SDEN.

SDEN documentation:
https://developer.arm.com/documentation/SDEN-1775101/latest

Change-Id: Ie010dae90dabf8670f588a06f9a606cf41e22afa
Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index e12795f..75f2a77 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -557,7 +557,8 @@
 CPU_FLAG_LIST += ERRATA_A710_2083908
 
 # Flag to apply erratum 2058056 workaround during reset. This erratum applies
-# to revisions r0p0, r1p0 and r2p0 of the Cortex-A710 cpu and is still open.
+# to revisions r0p0, r1p0, r2p0 and r2p1 of the Cortex-A710 cpu and is still
+# open.
 CPU_FLAG_LIST += ERRATA_A710_2058056
 
 # Flag to apply erratum 2055002 workaround during reset. This erratum applies