board_f/r: Use static const for the init sequences

These tables should be declared static const. Unfortunately the table in
board_r is updated on machines with manual relocation.

Update them.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/common/board_f.c b/common/board_f.c
index 88ecfe0..62cdd8c 100644
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -846,7 +846,7 @@
 	return 0;
 }
 
-static init_fnc_t init_sequence_f[] = {
+static const init_fnc_t init_sequence_f[] = {
 #ifdef CONFIG_SANDBOX
 	setup_ram_buf,
 #endif
@@ -1098,7 +1098,7 @@
  * NOTE: At present only x86 uses this route, but it is intended that
  * all archs will move to this when generic relocation is implemented.
  */
-static init_fnc_t init_sequence_f_r[] = {
+static const init_fnc_t init_sequence_f_r[] = {
 #if !CONFIG_IS_ENABLED(X86_64)
 	init_cache_f_r,
 #endif