config: nintendo switch: update defconfig

- Compile for speed (-O2)
- Enable env with version strings
- Disable unused code

configs/nintendo-switch_defconfig

@@ -3,16 +3,16 @@ CONFIG_TEGRA=y
 CONFIG_TEGRA210=y
 CONFIG_TEGRA210_CARVEOUT_EXACT_SIZE=y
 CONFIG_TARGET_NINTENDO_SWITCH=y
-CONFIG_ARMV8_SEC_FIRMWARE_SUPPORT=y
-CONFIG_SEC_FIRMWARE_ARMV8_PSCI=y
 # CONFIG_PSCI_RESET is not set
 CONFIG_DEFAULT_DEVICE_TREE="tegra210-nintendo-switch"
+CONFIG_FIT=y
 CONFIG_ANDROID_BOOT_IMAGE=y
 CONFIG_POSITION_INDEPENDENT=y
+# CONFIG_EXPERT is not set
 CONFIG_SYS_MALLOC_F_LEN=0x2000
 CONFIG_SYS_STDIO_DEREGISTER=y
 CONFIG_SYS_PROMPT="Switch # "
-CONFIG_OF_SYSTEM_SETUP=y
+CONFIG_VERSION_VARIABLE=y
 CONFIG_ENV_IS_NOWHERE=y
 CONFIG_BOOTDELAY=0
 CONFIG_BOOTCOMMAND="run distro_bootcmd"
@@ -27,12 +27,16 @@ CONFIG_CMD_MMC=y
 CONFIG_CMD_READ=y
 CONFIG_CMD_SETEXPR=y
 CONFIG_CMD_DTIMG=y
+# CONFIG_CMD_ELF is not set
+# CONFIG_CMD_XIMG is not set
+# CONFIG_CMD_ENTERRCM is not set
 # CONFIG_CMD_NET is not set
 # CONFIG_CMD_IMI is not set
 # CONFIG_CMD_FLASH is not set
 # CONFIG_CMD_FPGA is not set
 # CONFIG_CMD_NFS is not set
 # CONFIG_CMD_LZMADEC is not set
+# CONFIG_CMD_EXT2 is not set
 # CONFIG_FAT_WRITE is not set
 CONFIG_FAT_FAST=y
 CONFIG_FAT_EXFAT=y
@@ -54,4 +58,5 @@ CONFIG_NO_FB_CLEAR=y
 # CONFIG_VIDEO_BPP8 is not set
 # CONFIG_VIDEO_BPP16 is not set
 CONFIG_CC_OPTIMIZE_LIBS_FOR_SPEED=y
+# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
 CONFIG_REGEX=y