ti816x: Modernize the defconfig

- Switch to using <configs/ti_armv7_omap.h> and family.  This lets us
  drop lots of custom defines.
- Ensure that our default environment uses DEFAULT_LINUX_BOOT_ENV so
  that Linux will boot correctly.
- Enable CONFIG_DISTRO_DEFAULTS
- Switch to using CONFIG_OF_CONTROL
- Various other cleanups to match other SoCs in the family line.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/ti816x_evm_defconfig b/configs/ti816x_evm_defconfig
index 4f90192..729b709d 100644
--- a/configs/ti816x_evm_defconfig
+++ b/configs/ti816x_evm_defconfig
@@ -8,25 +8,32 @@
 CONFIG_SPL_SERIAL_SUPPORT=y
 CONFIG_SPL_LIBDISK_SUPPORT=y
 CONFIG_SPL_NAND_SUPPORT=y
+CONFIG_SPL_STACK_R_ADDR=0x82000000
 CONFIG_SPL_FAT_SUPPORT=y
+CONFIG_DEFAULT_DEVICE_TREE="dm8168-evm"
+CONFIG_DISTRO_DEFAULTS=y
 CONFIG_SYS_EXTRA_OPTIONS="NAND"
 CONFIG_BOOTDELAY=3
 CONFIG_SYS_CONSOLE_INFO_QUIET=y
 CONFIG_VERSION_VARIABLE=y
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_SPL=y
+CONFIG_SPL_STACK_R=y
 CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_USE_SECTOR=y
 CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR=0x300
-CONFIG_SPL_YMODEM_SUPPORT=y
-CONFIG_HUSH_PARSER=y
-CONFIG_SYS_PROMPT="u-boot/ti816x# "
 # CONFIG_CMD_IMLS is not set
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_MMC=y
+CONFIG_CMD_I2C=y
+# CONFIG_CMD_FPGA is not set
 # CONFIG_CMD_SETEXPR is not set
-CONFIG_CMD_EXT2=y
-CONFIG_CMD_FAT=y
+CONFIG_CMD_EXT4_WRITE=y
+# CONFIG_ISO_PARTITION is not set
+# CONFIG_EFI_PARTITION is not set
+CONFIG_OF_CONTROL=y
+CONFIG_DM=y
+CONFIG_DM_GPIO=y
+CONFIG_DM_I2C=y
 CONFIG_MMC_OMAP_HS=y
 CONFIG_SYS_NS16550=y
-CONFIG_OF_LIBFDT=y
 # CONFIG_USE_PRIVATE_LIBGCC is not set