Rename symbols and files relating to CVE-2017-5715

This patch renames symbols and files relating to CVE-2017-5715 to make
it easier to introduce new symbols and files for new CVE mitigations.

Change-Id: I24c23822862ca73648c772885f1690bed043dbc7
Signed-off-by: Dimitris Papastamos <dimitris.papastamos@arm.com>
diff --git a/lib/cpus/aarch64/cortex_a73.S b/lib/cpus/aarch64/cortex_a73.S
index 0a961ea..c66067d 100644
--- a/lib/cpus/aarch64/cortex_a73.S
+++ b/lib/cpus/aarch64/cortex_a73.S
@@ -38,7 +38,7 @@
 func cortex_a73_reset_func
 #if IMAGE_BL31 && WORKAROUND_CVE_2017_5715
 	cpu_check_csv2	x0, 1f
-	adr	x0, workaround_bpiall_vbar0_runtime_exceptions
+	adr	x0, wa_cve_2017_5715_bpiall_vbar
 	msr	vbar_el3, x0
 1:
 #endif