include: define CONFIG_SPL and CONFIG_TPL as 1

We are about to switch to Kconfig in the next commit.
But there are something to get done beforehand.

In Kconfig, include/generated/autoconf.h defines boolean
CONFIG macros as 1.

CONFIG_SPL and CONFIG_TPL, if defined, must be set to 1.
Otherwise, when switching to Kconfig, the build log
would be sprinkled with warning messages like this:
  warning: "CONFIG_SPL" redefined [enabled by default]

Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/tricorder.h b/include/configs/tricorder.h
index 6c2f653..1d48031 100644
--- a/include/configs/tricorder.h
+++ b/include/configs/tricorder.h
@@ -331,7 +331,7 @@
 #define CONFIG_SYS_SRAM_SIZE		0x10000
 
 /* Defines for SPL */
-#define CONFIG_SPL
+#define CONFIG_SPL 1
 #define CONFIG_SPL_FRAMEWORK
 #define CONFIG_SPL_NAND_SIMPLE