fix(cpus): fix the rev-var of Cortex-X2

Update the revision and variant information in the
errata ABI file, cortex_X2.S file for erratum ID - 2058056
to match the revision and variant in the latest SDEN.

SDEN documentation:
https://developer.arm.com/documentation/SDEN-1775100/latest

Change-Id: I28ee39949d977c53d6f5243100f0c29bc3c0428c
Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>
diff --git a/lib/cpus/aarch64/cortex_x2.S b/lib/cpus/aarch64/cortex_x2.S
index 816a58f..855d196 100644
--- a/lib/cpus/aarch64/cortex_x2.S
+++ b/lib/cpus/aarch64/cortex_x2.S
@@ -50,7 +50,7 @@
 	CORTEX_X2_CPUECTLR2_EL1_PF_MODE_SHIFT, CORTEX_X2_CPUECTLR2_EL1_PF_MODE_WIDTH
 workaround_reset_end cortex_x2, ERRATUM(2058056)
 
-check_erratum_ls cortex_x2, ERRATUM(2058056), CPU_REV(2, 0)
+check_erratum_ls cortex_x2, ERRATUM(2058056), CPU_REV(2, 1)
 
 workaround_reset_start cortex_x2, ERRATUM(2081180), ERRATA_X2_2081180
 	/* Apply instruction patching sequence */
diff --git a/lib/cpus/cpu-ops.mk b/lib/cpus/cpu-ops.mk
index 82212f9..019924f 100644
--- a/lib/cpus/cpu-ops.mk
+++ b/lib/cpus/cpu-ops.mk
@@ -690,7 +690,7 @@
 CPU_FLAG_LIST += ERRATA_X2_2002765
 
 # Flag to apply erratum 2058056 workaround during reset. This erratum applies
-# to revisions r0p0, r1p0, and r2p0 of the Cortex-X2 cpu and is still open.
+# to revisions r0p0, r1p0, r2p0 and r2p1 of the Cortex-X2 cpu and is still open.
 CPU_FLAG_LIST += ERRATA_X2_2058056
 
 # Flag to apply erratum 2083908 workaround during reset. This erratum applies