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/services/std_svc/errata_abi/errata_abi_main.c b/services/std_svc/errata_abi/errata_abi_main.c
index c0a089b..dbfd76b 100644
--- a/services/std_svc/errata_abi/errata_abi_main.c
+++ b/services/std_svc/errata_abi/errata_abi_main.c
@@ -310,7 +310,7 @@
 		[1] = {2008768, 0x00, 0x20, ERRATA_A710_2008768},
 		[2] = {2017096, 0x00, 0x20, ERRATA_A710_2017096},
 		[3] = {2055002, 0x10, 0x20, ERRATA_A710_2055002},
-		[4] = {2058056, 0x00, 0x20, ERRATA_A710_2058056},
+		[4] = {2058056, 0x00, 0x21, ERRATA_A710_2058056},
 		[5] = {2081180, 0x00, 0x20, ERRATA_A710_2081180},
 		[6] = {2083908, 0x20, 0x20, ERRATA_A710_2083908},
 		[7] = {2136059, 0x00, 0x20, ERRATA_A710_2136059},