Fix MISRA rule 8.4 Part 1

Rule 8.4: A compatible declaration shall be visible when
          an object or function with external linkage is defined

Fixed for:
	make DEBUG=1 PLAT=fvp LOG_LEVEL=50 all

Change-Id: I7c2ad3f5c015411c202605851240d5347e4cc8c7
Signed-off-by: Roberto Vargas <roberto.vargas@arm.com>
diff --git a/plat/arm/common/arm_gicv3.c b/plat/arm/common/arm_gicv3.c
index e273b77..b8ffd6b 100644
--- a/plat/arm/common/arm_gicv3.c
+++ b/plat/arm/common/arm_gicv3.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015-2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -35,8 +35,8 @@
  * We save and restore the GICv3 context on system suspend. Allocate the
  * data in the designated EL3 Secure carve-out memory
  */
-gicv3_redist_ctx_t rdist_ctx __section("arm_el3_tzc_dram");
-gicv3_dist_ctx_t dist_ctx __section("arm_el3_tzc_dram");
+static gicv3_redist_ctx_t rdist_ctx __section("arm_el3_tzc_dram");
+static gicv3_dist_ctx_t dist_ctx __section("arm_el3_tzc_dram");
 
 /*
  * MPIDR hashing function for translating MPIDRs read from GICR_TYPER register
@@ -58,7 +58,7 @@
 	return plat_arm_calc_core_pos(mpidr);
 }
 
-const gicv3_driver_data_t arm_gic_data = {
+static const gicv3_driver_data_t arm_gic_data __unused = {
 	.gicd_base = PLAT_ARM_GICD_BASE,
 	.gicr_base = PLAT_ARM_GICR_BASE,
 	.interrupt_props = arm_interrupt_props,