Tegra: print GICC registers conditionally

The GICC interface exists only on the interrupt controllers following
the GICv2 specification.

This patch prints the GICC register contents from the platform's macro,
plat_crash_print_regs' only when TEGRA_GICC_BASE is defined. This
allows platforms using future versions of the GIC specification to
still use this macro.

Change-Id: Ia5762d0a1ae28c832664d69362a7776e46a22ad1
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>

plat/nvidia/tegra/include/plat_macros.S

 /*
  * Copyright (c) 2015-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2015-2020, NVIDIA Corporation. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -27,6 +28,7 @@ spacer:
  * ---------------------------------------------
  */
 .macro plat_crash_print_regs
+#ifdef TEGRA_GICC_BASE
 	mov_imm	x16, TEGRA_GICC_BASE
 
 	/* gicc base address is now in x16 */
@@ -37,7 +39,7 @@ spacer:
 	ldr	w10, [x16, #GICC_CTLR]
 	/* Store to the crash buf and print to cosole */
 	bl	str_in_crash_buf_print
-
+#endif
 	/* Print the GICD_ISPENDR regs */
 	mov_imm	x16, TEGRA_GICD_BASE
 	add	x7, x16, #GICD_ISPENDR