arm: socfpga: agilex5: Enable cache flush for system memory cache in CCU

set/way instructions "dc cisw" which is used by the "dcache flush" command
only flushing CPU data caches from L1 -> L2 -> L3 to system memory cache in
cache coherency unit, hence this patch enables data flush from system
memory cache of CCU into DDR memory.

Signed-off-by: Tien Fong Chee <tien.fong.chee@altera.com>
diff --git a/arch/arm/mach-socfpga/Makefile b/arch/arm/mach-socfpga/Makefile
index 7e37cca..cccba71 100644
--- a/arch/arm/mach-socfpga/Makefile
+++ b/arch/arm/mach-socfpga/Makefile
@@ -65,6 +65,7 @@
 obj-y	+= wrap_handoff_soc64.o
 obj-y	+= wrap_pll_config_soc64.o
 obj-y	+= altera-sysmgr.o
+obj-y	+= ccu_ncore3.o
 endif
 
 ifdef CONFIG_TARGET_SOCFPGA_N5X