defconfig: k2g_hs_evm: Add k2g_hs_evm_defconfig

TI K2G secure devices have to be built with TI_SECURE_DEVICE, FIT, and
FIT_IMAGE_POST_PROCESS enabled. Add a dedicated defconfig for this.

Signed-off-by: Andrew F. Davis <afd@ti.com>

configs/k2g_hs_evm_defconfig

+CONFIG_ARM=y
+CONFIG_ARCH_KEYSTONE=y
+CONFIG_TARGET_K2G_EVM=y
+CONFIG_TI_SECURE_DEVICE=y
+CONFIG_SYS_TEXT_BASE=0x0c000060
+CONFIG_DEFAULT_DEVICE_TREE="keystone-k2g-evm"
+CONFIG_FIT=y
+CONFIG_OF_BOARD_SETUP=y
+CONFIG_FIT_IMAGE_POST_PROCESS=y
+CONFIG_SYS_CONSOLE_INFO_QUIET=y
+CONFIG_VERSION_VARIABLE=y
+CONFIG_HUSH_PARSER=y
+CONFIG_CMD_BOOTZ=y
+# CONFIG_CMD_IMLS is not set
+CONFIG_CMD_ASKENV=y
+# CONFIG_CMD_FLASH is not set
+CONFIG_CMD_MMC=y
+CONFIG_CMD_PART=y
+CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
+CONFIG_CMD_I2C=y
+CONFIG_CMD_USB=y
+CONFIG_CMD_REMOTEPROC=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_CMD_UBI=y
+CONFIG_ISO_PARTITION=y
+CONFIG_EFI_PARTITION=y
+CONFIG_OF_CONTROL=y
+CONFIG_DM=y
+# CONFIG_BLK is not set
+CONFIG_DM_MMC=y
+# CONFIG_DM_MMC_OPS is not set
+CONFIG_MMC_OMAP_HS=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_BAR=y
+CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_DM_ETH=y
+CONFIG_REMOTEPROC_TI_POWER=y
+CONFIG_DM_SERIAL=y
+CONFIG_SYS_NS16550=y
+CONFIG_DM_SPI=y
+CONFIG_USB=y
+CONFIG_USB_XHCI_HCD=y
+CONFIG_USB_XHCI_DWC3=y
+CONFIG_USB_STORAGE=y