feat(intel): update CPUECTLR_EL1 to boost ethernet performance

This patch is the workaround for Agilex5 Ethernet for performance
boost.

Change-Id: I702f0cb0beff8b3ea119205ec41dd4e825e9126b
Signed-off-by: Jit Loon Lim <jit.loon.lim@altera.com>
diff --git a/plat/intel/soc/common/include/socfpga_private.h b/plat/intel/soc/common/include/socfpga_private.h
index fbe18c3..782b2b5 100644
--- a/plat/intel/soc/common/include/socfpga_private.h
+++ b/plat/intel/soc/common/include/socfpga_private.h
@@ -65,4 +65,6 @@
 
 void plat_secondary_cpus_bl31_entry(void);
 
+void setup_clusterectlr_el1(void);
+
 #endif /* SOCFPGA_PRIVATE_H */