ci(errata_abi): Add testconfigs to exercise errata ABI

Added TF-A and TFTF test configs to exercise the Errata ABI.

Signed-off-by: Sona Mathew <SonaRebecca.Mathew@arm.com>
Change-Id: I23017b384d011a63b66451dcf38585b69faf2c5f
(cherry picked from commit 99530102d8c58529ed5731669f7a18a765f3f3f0)
diff --git a/tftf_config/fvp-errata-abi b/tftf_config/fvp-errata-abi
new file mode 100644
index 0000000..13edcfa
--- /dev/null
+++ b/tftf_config/fvp-errata-abi
@@ -0,0 +1,3 @@
+CROSS_COMPILE=aarch64-none-elf-
+PLAT=fvp
+TESTS=errata_abi