feat(plat/qti): fix to support cpu errata

fix to support ARM CPU errata based on core used.

Signed-off-by: Saurabh Gorecha <quic_sgorecha@quicinc.com>
Change-Id: If1a438f98f743435a7a0b683a32ccf14164db37e
diff --git a/lib/cpus/aarch64/cortex_a55.S b/lib/cpus/aarch64/cortex_a55.S
index 7838304..0e0388b 100644
--- a/lib/cpus/aarch64/cortex_a55.S
+++ b/lib/cpus/aarch64/cortex_a55.S
@@ -16,6 +16,8 @@
 #error "Cortex-A55 must be compiled with HW_ASSISTED_COHERENCY enabled"
 #endif
 
+	.globl cortex_a55_reset_func
+	.globl cortex_a55_core_pwr_dwn
 	/* --------------------------------------------------
 	 * Errata Workaround for Cortex A55 Errata #768277.
 	 * This applies only to revision r0p0 of Cortex A55.