plat/arm/board/arm_fpga: Initialize the Generic Interrupt Controller

This initializes the GIC using the Arm GIC drivers in TF-A.
The initial FPGA image uses a GIC600 implementation, and so that its
power controller is enabled, this platform port calls the corresponding
implementation-specific routines.

Signed-off-by: Oliver Swede <oli.swede@arm.com>
Change-Id: I88d5a073eead4b653b1ca73273182cd98a95e4c5
diff --git a/plat/arm/board/arm_fpga/fpga_bl31_setup.c b/plat/arm/board/arm_fpga/fpga_bl31_setup.c
index 26228f6..d499379 100644
--- a/plat/arm/board/arm_fpga/fpga_bl31_setup.c
+++ b/plat/arm/board/arm_fpga/fpga_bl31_setup.c
@@ -51,11 +51,12 @@
 
 void bl31_platform_setup(void)
 {
+	/* Initialize the GIC driver, cpu and distributor interfaces */
+	plat_fpga_gic_init();
+
 	/* Write frequency to CNTCRL and initialize timer */
 	generic_delay_timer_init();
 	mmio_write_32(FPGA_TIMER_BASE, ((1 << 8) | 1UL));
-
-	/* TODO: initialize GIC using the specifications of the FPGA image */
 }
 
 entry_point_info_t *bl31_plat_get_next_image_ep_info(uint32_t type)