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/docs/design/cpu-specific-build-macros.rst b/docs/design/cpu-specific-build-macros.rst
index 2cf7992..e67fca2 100644
--- a/docs/design/cpu-specific-build-macros.rst
+++ b/docs/design/cpu-specific-build-macros.rst
@@ -685,7 +685,7 @@
    it is still open.
 
 -  ``ERRATA_X2_2058056``: This applies errata 2058056 workaround to Cortex-X2
-   CPU. This needs to be enabled for revisions r0p0, r1p0, and r2p0 of the CPU,
+   CPU. This needs to be enabled for revisions r0p0, r1p0, r2p0 and r2p1 of the CPU,
    it is still open.
 
 -  ``ERRATA_X2_2083908``: This applies errata 2083908 workaround to Cortex-X2
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
diff --git a/services/std_svc/errata_abi/errata_abi_main.c b/services/std_svc/errata_abi/errata_abi_main.c
index 93f0efe..2bf7000 100644
--- a/services/std_svc/errata_abi/errata_abi_main.c
+++ b/services/std_svc/errata_abi/errata_abi_main.c
@@ -366,13 +366,13 @@
 	.cpu_errata_list = {
 		[0] = {2002765, 0x00, 0x20, ERRATA_X2_2002765},
 		[1] = {2017096, 0x00, 0x20, ERRATA_X2_2017096},
-		[2] = {2058056, 0x00, 0x20, ERRATA_X2_2058056},
+		[2] = {2058056, 0x00, 0x21, ERRATA_X2_2058056},
 		[3] = {2081180, 0x00, 0x20, ERRATA_X2_2081180},
-		[4] = {2083908, 0x00, 0x20, ERRATA_X2_2083908},
+		[4] = {2083908, 0x20, 0x20, ERRATA_X2_2083908},
 		[5] = {2147715, 0x20, 0x20, ERRATA_X2_2147715},
 		[6] = {2216384, 0x00, 0x20, ERRATA_X2_2216384},
 		[7] = {2282622, 0x00, 0x21, ERRATA_X2_2282622},
-		[8] = {2371105, 0x00, 0x21, ERRATA_X2_2371105},
+		[8] = {2371105, 0x00, 0x20, ERRATA_X2_2371105},
 		[9] = {2701952, 0x00, 0x21, ERRATA_X2_2701952, \
 			ERRATA_NON_ARM_INTERCONNECT},
 		[10] = {2768515, 0x00, 0x21, ERRATA_X2_2768515},