spl: use different BOARD_INIT MACRO for spl and tpl

SPL and TPL may not always need spl_board_init() at the same time.
Signed-off-by: NKever Yang <kever.yang@rock-chips.com>
Reviewed-by: NPhilipp Tomsich <philipp.tomsich@theobroma-systems.com>

common/spl/Kconfig

@@ -757,6 +757,13 @@ config TPL
 
 if TPL
 
+config TPL_BOARD_INIT
+	bool "Call board-specific initialization in TPL"
+	help
+	  If this option is enabled, U-Boot will call the function
+	  spl_board_init() from board_init_r(). This function should be
+	  provided by the board.
+
 config TPL_LDSCRIPT
         string "Linker script for the TPL stage"
 	depends on TPL

common/spl/spl.c

@@ -407,7 +407,7 @@ void board_init_r(gd_t *dummy1, ulong dummy2)
 	timer_init();
 #endif
 
-#ifdef CONFIG_SPL_BOARD_INIT
+#if CONFIG_IS_ENABLED(BOARD_INIT)
 	spl_board_init();
 #endif