chore: rename hunter_elp to cortex-x4

Rename hunter_elp to cortex-x4

Change-Id: I78c8c009d7bee14b4793dc1d950ed81273216831
Signed-off-by: Govindraj Raja <govindraj.raja@arm.com>
diff --git a/plat/arm/board/tc/platform.mk b/plat/arm/board/tc/platform.mk
index d383ead..1bde94e 100644
--- a/plat/arm/board/tc/platform.mk
+++ b/plat/arm/board/tc/platform.mk
@@ -80,7 +80,7 @@
 ifeq (${TARGET_PLATFORM}, 2)
 TC_CPU_SOURCES	+=	lib/cpus/aarch64/cortex_hayes.S \
 			lib/cpus/aarch64/cortex_hunter.S \
-			lib/cpus/aarch64/cortex_hunter_elp_arm.S
+			lib/cpus/aarch64/cortex_x4.S
 endif
 
 INTERCONNECT_SOURCES	:=	${TC_BASE}/tc_interconnect.c