feat(css): initialise generic timer early in the boot

Initialize generic delay timer to enable its use to insert delays
in execution paths as required.

Change-Id: I52232796f20d9692f0115d5e5395451a54b489c6
Signed-off-by: Pranav Madhu <pranav.madhu@arm.com>
diff --git a/plat/arm/css/sgi/sgi-common.mk b/plat/arm/css/sgi/sgi-common.mk
index 2cd7034..efa3cc6 100644
--- a/plat/arm/css/sgi/sgi-common.mk
+++ b/plat/arm/css/sgi/sgi-common.mk
@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2018-2022, Arm Limited and Contributors. All rights reserved.
+# Copyright (c) 2018-2024, Arm Limited and Contributors. All rights reserved.
 #
 # SPDX-License-Identifier: BSD-3-Clause
 #
@@ -50,7 +50,8 @@
 BL31_SOURCES		+=	${INTERCONNECT_SOURCES}			\
 				${ENT_GIC_SOURCES}			\
 				${CSS_ENT_BASE}/sgi_bl31_setup.c	\
-				${CSS_ENT_BASE}/sgi_topology.c
+				${CSS_ENT_BASE}/sgi_topology.c          \
+				drivers/delay_timer/generic_delay_timer.c
 
 ifneq (${RESET_TO_BL31},0)
   $(error "Using BL31 as the reset vector is not supported on ${PLAT} platform. \
diff --git a/plat/arm/css/sgi/sgi_bl31_setup.c b/plat/arm/css/sgi/sgi_bl31_setup.c
index 7aa7b34..ac1ea48 100644
--- a/plat/arm/css/sgi/sgi_bl31_setup.c
+++ b/plat/arm/css/sgi/sgi_bl31_setup.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018-2023, Arm Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2024, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -12,6 +12,7 @@
 #include <common/debug.h>
 #include <drivers/arm/css/css_mhu_doorbell.h>
 #include <drivers/arm/css/scmi.h>
+#include <drivers/generic_delay_timer.h>
 #include <plat/arm/common/plat_arm.h>
 
 #include <plat/common/platform.h>
@@ -104,6 +105,8 @@
 
 void sgi_bl31_common_platform_setup(void)
 {
+	generic_delay_timer_init();
+
 	arm_bl31_platform_setup();
 
 	/* Configure the warm reboot SGI for primary core */