cam_enc_4xx: Move CONFIG_SPL_PAD_TO to a config header

For most boards which define CONFIG_SPL_PAD_TO,
it is defined in config header files.
Currently, there exists only one exception, cam_enc_4xx board.

This patch moves CONFIG_SPL_PAD_TO definition
from board/ait/cam_enc_4xx/config.mk
to include/configs/cam_enc_4xx.h.

With this modification, we can delete a glue code
in the top level config.mk:

ifneq ($(CONFIG_SPL_PAD_TO),)
CPPFLAGS += -DCONFIG_SPL_PAD_TO=$(CONFIG_SPL_PAD_TO)
endif

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Heiko Schocher <hs@denx.de>

board/ait/cam_enc_4xx/config.mk

@@ -7,8 +7,6 @@
 # (mem base + reserved)
 #
 
-#Provide at least 16MB spacing between us and the Linux Kernel image
-CONFIG_SPL_PAD_TO := 12320
 UBL_CONFIG = $(SRCTREE)/board/$(BOARDDIR)/ublimage.cfg
 ifndef CONFIG_SPL_BUILD
 ALL-y += $(obj)u-boot.ubl

config.mk

@@ -232,10 +232,6 @@ ifneq ($(CONFIG_SYS_TEXT_BASE),)
 CPPFLAGS += -DCONFIG_SYS_TEXT_BASE=$(CONFIG_SYS_TEXT_BASE)
 endif
 
-ifneq ($(CONFIG_SPL_PAD_TO),)
-CPPFLAGS += -DCONFIG_SPL_PAD_TO=$(CONFIG_SPL_PAD_TO)
-endif
-
 ifeq ($(CONFIG_SPL_BUILD),y)
 CPPFLAGS += -DCONFIG_SPL_BUILD
 ifeq ($(CONFIG_TPL_BUILD),y)

include/configs/cam_enc_4xx.h

@@ -216,6 +216,8 @@
 #define CONFIG_SPL_STACK		(0x00010000 + 0x7f00)
 
 #define CONFIG_SPL_TEXT_BASE		0x00000020 /*CONFIG_SYS_SRAM_START*/
+/* Provide at least 16MB spacing between us and the Linux Kernel image */
+#define CONFIG_SPL_PAD_TO		12320
 #define CONFIG_SPL_MAX_FOOTPRINT	12288
 
 #ifndef CONFIG_SPL_BUILD