synquacer: Enable GICv3 support

synquacer uses GICv3 compliant GIC500. So enable proper GICv3 driver
initialization.

Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
diff --git a/plat/socionext/synquacer/sq_bl31_setup.c b/plat/socionext/synquacer/sq_bl31_setup.c
index f3d58a9..da25ff1 100644
--- a/plat/socionext/synquacer/sq_bl31_setup.c
+++ b/plat/socionext/synquacer/sq_bl31_setup.c
@@ -99,6 +99,10 @@
 	/* Initialize the CCN interconnect */
 	plat_sq_interconnect_init();
 	plat_sq_interconnect_enter_coherency();
+
+	/* Initialize the GIC driver, cpu and distributor interfaces */
+	sq_gic_driver_init();
+	sq_gic_init();
 }
 
 void bl31_plat_runtime_setup(void)