configs: add mkeficapsule to tools-only_defconfig

mkeficapsule is used to create capsules for UEFI firmware update.
To ease inclusion into U-Boot tools packages of Linux distributions we
should add it to the tools-only_defconfig.

Provide dummy values for CONFIG_AVB_BUF_ADDR, CONFIG_AVB_BUF_SIZE to
satisfy Kconfig.

Suggested-by: Vagrant Cascadian <vagrant@debian.org>
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/configs/tools-only_defconfig b/configs/tools-only_defconfig
index 64a015b..d0e34cb 100644
--- a/configs/tools-only_defconfig
+++ b/configs/tools-only_defconfig
@@ -7,6 +7,8 @@
 CONFIG_FIT=y
 CONFIG_FIT_SIGNATURE=y
 CONFIG_MISC_INIT_F=y
+CONFIG_AVB_BUF_ADDR=0x0
+CONFIG_AVB_BUF_SIZE=0x8192
 # CONFIG_CMD_BOOTD is not set
 # CONFIG_CMD_BOOTM is not set
 # CONFIG_CMD_ELF is not set
@@ -31,4 +33,7 @@
 # CONFIG_VIRTIO_MMIO is not set
 # CONFIG_VIRTIO_PCI is not set
 # CONFIG_VIRTIO_SANDBOX is not set
-# CONFIG_EFI_LOADER is not set
+CONFIG_EFI_CAPSULE_ON_DISK=y
+CONFIG_EFI_CAPSULE_FIRMWARE_FIT=y
+CONFIG_EFI_CAPSULE_FIRMWARE_RAW=y
+CONFIG_EFI_CAPSULE_AUTHENTICATE=y