am335x_evm: Never set CONFIG_EXTRA_ENV_SETTINGS in SPL

Because of our support for network-based SPL, we don't discard all of
the environment related functions.  We however never make use of the
default CONFIG_EXTRA_ENV_SETTINGS items and as this variable grows, it
brings us closer to (or with some toolchains, over) our SPL size limit.
Never set this in the case of SPL.
Signed-off-by: NTom Rini <trini@ti.com>

include/configs/am335x_evm.h

@@ -49,6 +49,7 @@
 #define CONFIG_BOOTDELAY		1
 #define CONFIG_ENV_VARS_UBOOT_CONFIG
 #define CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
+#ifndef CONFIG_SPL_BUILD
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"loadaddr=0x80200000\0" \
 	"fdtaddr=0x80F80000\0" \
@@ -133,6 +134,8 @@
 		"if test $board_name = A335X_SK; then " \
 			"setenv fdtfile am335x-evmsk.dtb; fi\0" \
 
+#endif
+
 #define CONFIG_BOOTCOMMAND \
 	"mmc dev ${mmcdev}; if mmc rescan; then " \
 		"echo SD/MMC found on device ${mmcdev};" \
@@ -367,7 +370,6 @@
  */
 #undef CONFIG_SPL_ETH_SUPPORT
 #undef CONFIG_SPL_YMODEM_SUPPORT
-#undef CONFIG_EXTRA_ENV_SETTINGS
 #endif
 
 /*