cpu: add support for Demeter CPU

This patch adds the basic CPU library code to support the Demeter
CPU.  This CPU is based on the Makalu-ELP core so that CPU lib code
was adapted to create this patch.

Signed-off-by: John Powell <john.powell@arm.com>
Change-Id: Ib5740b748008a72788c557f0654d8d5e9ec0bb7f
diff --git a/plat/arm/board/fvp/platform.mk b/plat/arm/board/fvp/platform.mk
index 10258ad..3c70eed 100644
--- a/plat/arm/board/fvp/platform.mk
+++ b/plat/arm/board/fvp/platform.mk
@@ -135,6 +135,7 @@
 					lib/cpus/aarch64/cortex_a710.S	\
 					lib/cpus/aarch64/cortex_makalu.S	\
 					lib/cpus/aarch64/cortex_makalu_elp_arm.S \
+					lib/cpus/aarch64/cortex_demeter.S	\
 					lib/cpus/aarch64/cortex_a65.S		\
 					lib/cpus/aarch64/cortex_a65ae.S		\
 					lib/cpus/aarch64/cortex_a78c.S