feat(bl32): create an sp_min_setup function

This new C function will call sp_min_early_platform_setup2() and
sp_min_plat_arch_setup(). At this step the C environment is already
enabled, and it allows adding function like the one for early console
for which r9-r12 registers could be clobbered.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: I4cbf2f6acea769d595ff40b2e2b4ca5d29672878
diff --git a/bl32/sp_min/sp_min_private.h b/bl32/sp_min/sp_min_private.h
index 628581a..9c6b5fb 100644
--- a/bl32/sp_min/sp_min_private.h
+++ b/bl32/sp_min/sp_min_private.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2016, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2016-2024, Arm Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -7,6 +7,10 @@
 #ifndef SP_MIN_PRIVATE_H
 #define SP_MIN_PRIVATE_H
 
+#include <stdint.h>
+
+void sp_min_setup(u_register_t arg0, u_register_t arg1, u_register_t arg2,
+		  u_register_t arg3);
 void sp_min_main(void);
 void sp_min_warm_boot(void);
 void sp_min_fiq(void);