refactor(arm): simplify early platform setup function in BL2

Refactor `arm_bl2_early_platform_setup` to accept generic u_register_t
values, enabling support for firmware handoff boot arguments in
common code. This simplifies the interface for early platform setup.

Signed-off-by: Jayanth Dodderi Chidanand <jayanthdodderi.chidanand@arm.com>
Change-Id: Ie0dbe4d32bbef22bd185fdafe50091a2ea5f550f
diff --git a/plat/arm/board/fvp/fvp_bl2_setup.c b/plat/arm/board/fvp/fvp_bl2_setup.c
index 90d9608..989f058 100644
--- a/plat/arm/board/fvp/fvp_bl2_setup.c
+++ b/plat/arm/board/fvp/fvp_bl2_setup.c
@@ -52,10 +52,7 @@
 
 void bl2_early_platform_setup2(u_register_t arg0, u_register_t arg1, u_register_t arg2, u_register_t arg3)
 {
-#if TRANSFER_LIST
-	arg0 = arg3;
-#endif
-	arm_bl2_early_platform_setup((uintptr_t)arg0, (meminfo_t *)arg1);
+	arm_bl2_early_platform_setup(arg0, arg1, arg2, arg3);
 
 	/* Initialize the platform config for future decision making */
 	fvp_config_setup();