Enable DISTRO_DEFAULT on platforms that missed it before

A number of platforms had been using the distro default feature before
it was moved to Kconfig but did not enable the new Kconfig option when
it was enabled.  This caused a regression in terms of features and this
introduces breakage when more things move to Kconfig.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/am335x_sl50_defconfig b/configs/am335x_sl50_defconfig
index f49407e..99c09b9 100644
--- a/configs/am335x_sl50_defconfig
+++ b/configs/am335x_sl50_defconfig
@@ -15,6 +15,7 @@
 CONFIG_SPL_WATCHDOG_SUPPORT=y
 CONFIG_SPL_STACK_R_ADDR=0x82000000
 CONFIG_SPL_YMODEM_SUPPORT=y
+CONFIG_DISTRO_DEFAULTS=y
 CONFIG_FIT=y
 CONFIG_SYS_EXTRA_OPTIONS="EMMC_BOOT"
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
@@ -22,9 +23,7 @@
 CONFIG_SPL=y
 CONFIG_SPL_STACK_R=y
 CONFIG_SPL_OS_BOOT=y
-CONFIG_HUSH_PARSER=y
 # CONFIG_AUTOBOOT is not set
-CONFIG_CMD_BOOTZ=y
 # CONFIG_CMD_IMLS is not set
 CONFIG_CMD_ASKENV=y
 # CONFIG_CMD_FLASH is not set
@@ -33,13 +32,6 @@
 CONFIG_CMD_I2C=y
 CONFIG_CMD_GPIO=y
 # CONFIG_CMD_SETEXPR is not set
-CONFIG_CMD_DHCP=y
-CONFIG_CMD_MII=y
-CONFIG_CMD_PING=y
-CONFIG_CMD_EXT2=y
-CONFIG_CMD_EXT4=y
 CONFIG_CMD_EXT4_WRITE=y
-CONFIG_CMD_FAT=y
-CONFIG_CMD_FS_GENERIC=y
 CONFIG_SYS_NS16550=y
 CONFIG_OF_LIBFDT=y