errata: workaround for Cortex-A710 erratum 2083908

Cortex-A710 erratum 2083908 is a Cat B erratum that applies to
revision r2p0 and is still open. The workaround is to set
CPUACTLR5_EL1[13] to 1.

SDEN can be found here:
https://developer.arm.com/documentation/SDEN1775101/latest

Signed-off-by: nayanpatel-arm <nayankumar.patel@arm.com>
Change-Id: I876d26a7ac6ab0d7c567a9ec9f34fc0f952589d8
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index 6103a5a..fd34dcb 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -425,6 +425,10 @@
 # to revisions r0p0, r1p0 and r2p0 of the Cortex-A710 cpu and is still open.
 ERRATA_A710_2081180	?=0
 
+# Flag to apply erratum 2083908 workaround during reset. This erratum applies
+# to revision r2p0 of the Cortex-A710 cpu and is still open.
+ERRATA_A710_2083908	?=0
+
 # Flag to apply erratum 2067956 workaround during reset. This erratum applies
 # to revision r0p0 of the Neoverse N2 cpu and is still open.
 ERRATA_N2_2067956	?=0
@@ -806,6 +810,10 @@
 $(eval $(call assert_boolean,ERRATA_A710_2081180))
 $(eval $(call add_define,ERRATA_A710_2081180))
 
+# Process ERRATA_A710_2083908 flag
+$(eval $(call assert_boolean,ERRATA_A710_2083908))
+$(eval $(call add_define,ERRATA_A710_2083908))
+
 # Process ERRATA_N2_2067956 flag
 $(eval $(call assert_boolean,ERRATA_N2_2067956))
 $(eval $(call add_define,ERRATA_N2_2067956))