x86: qemu: Enable dhrystone

Provide the 'dhry' command, which helps to check that kvm is being used
properly with QEMU.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/qemu-x86_64_defconfig b/configs/qemu-x86_64_defconfig
index ff2a192..84b7dc8 100644
--- a/configs/qemu-x86_64_defconfig
+++ b/configs/qemu-x86_64_defconfig
@@ -89,4 +89,5 @@
 CONFIG_SPL_VIDEO=y
 # CONFIG_SPL_USE_TINY_PRINTF is not set
 CONFIG_GENERATE_ACPI_TABLE=y
+CONFIG_CMD_DHRYSTONE=y
 # CONFIG_GZIP is not set
diff --git a/configs/qemu-x86_defconfig b/configs/qemu-x86_defconfig
index ee5b150..d52afa4 100644
--- a/configs/qemu-x86_defconfig
+++ b/configs/qemu-x86_defconfig
@@ -66,4 +66,5 @@
 # CONFIG_VIDEO_VESA is not set
 CONFIG_CONSOLE_SCROLL_LINES=5
 CONFIG_GENERATE_ACPI_TABLE=y
+CONFIG_CMD_DHRYSTONE=y
 # CONFIG_GZIP is not set