riscv: qemu: enable CONFIG_CMD_BOOTEFI_SELFTEST

Enable CONFIG_CMD_BOOTEFI_SELFTEST for the QEMU RISC-V boards.

Travis CI QEMU testing has been enabled for qemu-riscv64_defconfig. With
this patch we will test the UEFI sub-system on the board.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/configs/qemu-riscv64_defconfig b/configs/qemu-riscv64_defconfig
index 19a5849..ef84dfd 100644
--- a/configs/qemu-riscv64_defconfig
+++ b/configs/qemu-riscv64_defconfig
@@ -6,5 +6,6 @@
 CONFIG_FIT=y
 CONFIG_DISPLAY_CPUINFO=y
 CONFIG_DISPLAY_BOARDINFO=y
+CONFIG_CMD_BOOTEFI_SELFTEST=y
 # CONFIG_CMD_MII is not set
 CONFIG_OF_PRIOR_STAGE=y