Mark GICV3, CCI and CCN boot time code as init

Mark the GICv3, CCI and CCN code only used in Bl31 initialization
with __init to be reclaimed once no longer needed.

Change-Id: I3d77f36758450d9d1d87ecc60bc1c63fe4082667
Signed-off-by: Daniel Boulby <daniel.boulby@arm.com>
diff --git a/drivers/arm/gic/v3/gicv3_main.c b/drivers/arm/gic/v3/gicv3_main.c
index 5af7e40..60f2e10 100644
--- a/drivers/arm/gic/v3/gicv3_main.c
+++ b/drivers/arm/gic/v3/gicv3_main.c
@@ -55,7 +55,7 @@
  * This function initialises the ARM GICv3 driver in EL3 with provided platform
  * inputs.
  ******************************************************************************/
-void gicv3_driver_init(const gicv3_driver_data_t *plat_driver_data)
+void __init gicv3_driver_init(const gicv3_driver_data_t *plat_driver_data)
 {
 	unsigned int gic_version;
 
@@ -129,7 +129,7 @@
  * This function initialises the GIC distributor interface based upon the data
  * provided by the platform while initialising the driver.
  ******************************************************************************/
-void gicv3_distif_init(void)
+void __init gicv3_distif_init(void)
 {
 	unsigned int bitmap = 0;