fix(security): report CVE 2022 23960 missing for aarch32 A57 and A72

Since there is no product deployed running EL3 in AArch32 mode for
Cortex-A57 and Cortex-A72, report the workaround for CVE 2022 23960
as missing on these cores.

Signed-off-by: John Powell <john.powell@arm.com>
Change-Id: I14d202c1179707257086ad0c4795c397e566b3e6

lib/cpus/aarch32/cortex_a57.S

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2022, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -396,6 +396,11 @@ func check_errata_cve_2018_3639
 	bx	lr
 endfunc check_errata_cve_2018_3639
 
+func check_errata_cve_2022_23960
+	mov	r0, #ERRATA_MISSING
+	bx	lr
+endfunc check_errata_cve_2022_23960
+
 	/* -------------------------------------------------
 	 * The CPU Ops reset function for Cortex-A57.
 	 * Shall clobber: r0-r6
@@ -600,6 +605,7 @@ func cortex_a57_errata_report
 	report_errata ERRATA_A57_859972, cortex_a57, 859972
 	report_errata WORKAROUND_CVE_2017_5715, cortex_a57, cve_2017_5715
 	report_errata WORKAROUND_CVE_2018_3639, cortex_a57, cve_2018_3639
+	report_errata WORKAROUND_CVE_2022_23960, cortex_a57, cve_2022_23960
 
 	pop	{r12, lr}
 	bx	lr

lib/cpus/aarch32/cortex_a72.S

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2022, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -101,6 +101,11 @@ func check_errata_cve_2018_3639
 	bx	lr
 endfunc check_errata_cve_2018_3639
 
+func check_errata_cve_2022_23960
+	mov	r0, #ERRATA_MISSING
+	bx	lr
+endfunc check_errata_cve_2022_23960
+
 	/* -------------------------------------------------
 	 * The CPU Ops reset function for Cortex-A72.
 	 * -------------------------------------------------
@@ -260,6 +265,7 @@ func cortex_a72_errata_report
 	report_errata ERRATA_A72_859971, cortex_a72, 859971
 	report_errata WORKAROUND_CVE_2017_5715, cortex_a72, cve_2017_5715
 	report_errata WORKAROUND_CVE_2018_3639, cortex_a72, cve_2018_3639
+	report_errata WORKAROUND_CVE_2022_23960, cortex_a72, cve_2022_23960
 
 	pop	{r12, lr}
 	bx	lr