errata: workaround for Cortex-A710 errata 2081180

Cortex-A710 erratum 2081180 is a Cat B erratum present in r0p0, r1p0,
and r2p0 of the Cortex-A710 processor core, and it is still open.

A710 SDEN: https://developer.arm.com/documentation/SDEN1775101/1000

Signed-off-by: nayanpatel-arm <nayankumar.patel@arm.com>
Change-Id: I1e8c2bc3d8dc326947ccfd91daf9083d666b2542
diff --git a/docs/design/cpu-specific-build-macros.rst b/docs/design/cpu-specific-build-macros.rst
index 194b6c6..9cd1074 100644
--- a/docs/design/cpu-specific-build-macros.rst
+++ b/docs/design/cpu-specific-build-macros.rst
@@ -365,6 +365,10 @@
    Cortex-A710 CPU. This needs to be enabled only for revisions r0p0, r1p0 and
    r2p0 of the CPU. It is still open.
 
+-  ``ERRATA_A710_2081180``: This applies errata 2081180 workaround to
+   Cortex-A710 CPU. This needs to be enabled only for revisions r0p0, r1p0 and
+   r2p0 of the CPU. It is still open.
+
 DSU Errata Workarounds
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