efi: Create a 64-bit app

Most modern platforms use 64-bit EFI so it is useful to have a U-Boot app
that runs under that. Add a (non-functional) build for this.

Note that --whole-archive causes the gcc 9.2 linker to crash, so disable
this for now. Once this is resolved, things should work.

For now, avoid mentioning the documentation for the 64-bit app, since it
does not work.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
diff --git a/configs/efi-x86_app32_defconfig b/configs/efi-x86_app32_defconfig
new file mode 100644
index 0000000..480ef64
--- /dev/null
+++ b/configs/efi-x86_app32_defconfig
@@ -0,0 +1,37 @@
+CONFIG_X86=y
+CONFIG_NR_DRAM_BANKS=8
+CONFIG_ENV_SIZE=0x1000
+CONFIG_DEFAULT_DEVICE_TREE="efi-x86_app"
+CONFIG_DEBUG_UART_BASE=0
+CONFIG_DEBUG_UART_CLOCK=0
+CONFIG_VENDOR_EFI=y
+CONFIG_TARGET_EFI_APP32=y
+CONFIG_DEBUG_UART=y
+CONFIG_FIT=y
+CONFIG_SHOW_BOOT_PROGRESS=y
+CONFIG_USE_BOOTARGS=y
+CONFIG_BOOTARGS="root=/dev/sdb3 init=/sbin/init rootwait ro"
+CONFIG_SYS_CONSOLE_INFO_QUIET=y
+CONFIG_DISPLAY_BOARDINFO_LATE=y
+CONFIG_LAST_STAGE_INIT=y
+CONFIG_HUSH_PARSER=y
+# CONFIG_CMD_BOOTM is not set
+CONFIG_CMD_PART=y
+# CONFIG_CMD_NET is not set
+CONFIG_CMD_TIME=y
+CONFIG_CMD_EXT2=y
+CONFIG_CMD_EXT4=y
+CONFIG_CMD_EXT4_WRITE=y
+CONFIG_CMD_FAT=y
+CONFIG_CMD_FS_GENERIC=y
+CONFIG_MAC_PARTITION=y
+CONFIG_ISO_PARTITION=y
+CONFIG_EFI_PARTITION=y
+CONFIG_OF_EMBED=y
+CONFIG_ENV_OVERWRITE=y
+CONFIG_SYS_RELOC_GD_ENV_ADDR=y
+CONFIG_REGMAP=y
+CONFIG_SYSCON=y
+# CONFIG_REGEX is not set
+# CONFIG_GZIP is not set
+CONFIG_EFI=y