Remove CONFIG_SYS_SPL_LEN largely

This is mostly unused.  In the case where it is currently used, it means
the same as CONFIG_SPL_PAD_TO, which is already set for the platform.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/stm32f746-disco.h b/include/configs/stm32f746-disco.h
index ac54c50..80db425 100644
--- a/include/configs/stm32f746-disco.h
+++ b/include/configs/stm32f746-disco.h
@@ -39,10 +39,9 @@
 			BOOTENV
 
 #define CONFIG_SYS_MONITOR_LEN		(512 * 1024)
-#define CONFIG_SYS_SPL_LEN		0x00008000
 #define CONFIG_SYS_UBOOT_START		0x080083FD
 #define CONFIG_SYS_UBOOT_BASE		(CONFIG_SYS_FLASH_BASE + \
-					 CONFIG_SYS_SPL_LEN)
+					 CONFIG_SPL_PAD_TO)
 
 /* DT blob (fdt) address */
 #define CONFIG_SYS_FDT_BASE		(CONFIG_SYS_FLASH_BASE + \