sandbox: enable capsule update for testing

Add more configuration options to allow for efi capsule update
on sandbox.

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
diff --git a/configs/sandbox64_defconfig b/configs/sandbox64_defconfig
index 5fbbfd7..f82dc9c 100644
--- a/configs/sandbox64_defconfig
+++ b/configs/sandbox64_defconfig
@@ -231,3 +231,9 @@
 CONFIG_UNIT_TEST=y
 CONFIG_UT_TIME=y
 CONFIG_UT_DM=y
+#
+CONFIG_DFU_SF=y
+CONFIG_EFI_RUNTIME_UPDATE_CAPSULE=y
+CONFIG_EFI_CAPSULE_ON_DISK=y
+CONFIG_EFI_CAPSULE_FIRMWARE_FIT=y
+CONFIG_EFI_CAPSULE_FIRMWARE_RAW=y