refactor(cpus): use cpu errata wrappers Cortex-A7 and A9 aarch32 cpus

Adapt to use errata frame-work cpu macro helpers for following cpu's:

- Cortex-A7
- Cortex-A9

Testing:
- Manual comparison of disassembly with and without the patch.
- Compile testing.

Change-Id: I88eb90d7fd0e82fc4bfc9d1aee947f0c820e1222
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>

lib/cpus/aarch32/cortex_a7.S

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2023, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -69,14 +69,7 @@ func cortex_a7_cluster_pwr_dwn
 	b	cortex_a7_disable_smp
 endfunc cortex_a7_cluster_pwr_dwn
 
-#if REPORT_ERRATA
-/*
- * Errata printing function for Cortex-A7. Must follow AAPCS.
- */
-func cortex_a7_errata_report
-	bx	lr
-endfunc cortex_a7_errata_report
-#endif
+errata_report_shim cortex_a7
 
 declare_cpu_ops cortex_a7, CORTEX_A7_MIDR, \
 	cortex_a7_reset_func, \

lib/cpus/aarch32/cortex_a9.S

@@ -35,14 +35,16 @@ func cortex_a9_enable_smp
 	bx	lr
 endfunc cortex_a9_enable_smp
 
-func check_errata_a9_794073
+func check_errata_794073
 #if ERRATA_A9_794073
 	mov	r0, #ERRATA_APPLIES
 #else
 	mov	r0, #ERRATA_MISSING
 #endif
 	bx	lr
-endfunc check_errata_a9_794073
+endfunc check_errata_794073
+
+add_erratum_entry cortex_a9, ERRATUM(794073), ERRATA_A9_794073
 
 func check_errata_cve_2017_5715
 #if WORKAROUND_CVE_2017_5715
@@ -53,27 +55,9 @@ func check_errata_cve_2017_5715
 	bx	lr
 endfunc check_errata_cve_2017_5715
 
-#if REPORT_ERRATA
-/*
- * Errata printing function for Cortex A9. Must follow AAPCS.
- */
-func cortex_a9_errata_report
-	push	{r12, lr}
-
-	bl	cpu_get_rev_var
-	mov	r4, r0
+add_erratum_entry cortex_a9, CVE(2017, 5715), WORKAROUND_CVE_2017_5715
 
-	/*
-	 * Report all errata. The revision-variant information is passed to
-	 * checking functions of each errata.
-	 */
-	report_errata WORKAROUND_CVE_2017_5715, cortex_a9, cve_2017_5715
-	report_errata ERRATA_A9_794073, cortex_a9, a9_794073
-
-	pop	{r12, lr}
-	bx	lr
-endfunc cortex_a9_errata_report
-#endif
+errata_report_shim cortex_a9
 
 func cortex_a9_reset_func
 #if IMAGE_BL32 && WORKAROUND_CVE_2017_5715