arm_fpga: Add Klein and Matterhorn support

To support FPGAs with those cores as well, as the respective cpulib
files to the Makefile.

Change-Id: I1a60867d5937be88b32b210c7817be4274554a76
Signed-off-by: Andre Przywara <andre.przywara@arm.com>

plat/arm/board/arm_fpga/platform.mk

@@ -64,7 +64,10 @@ else
 				lib/cpus/aarch64/neoverse_zeus.S	\
 				lib/cpus/aarch64/cortex_hercules_ae.S	\
 				lib/cpus/aarch64/cortex_a65.S		\
-				lib/cpus/aarch64/cortex_a65ae.S
+				lib/cpus/aarch64/cortex_a65ae.S		\
+				lib/cpus/aarch64/cortex_klein.S		\
+				lib/cpus/aarch64/cortex_matterhorn.S
+
 # AArch64/AArch32 cores
 	FPGA_CPU_LIBS	+=	lib/cpus/aarch64/cortex_a55.S	\
 				lib/cpus/aarch64/cortex_a75.S