x86: config: Enable dhrystone command for link

Enable this command so we can get an approximate performance measurement.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

configs/chromebook_link64_defconfig

@@ -86,4 +86,5 @@ CONFIG_FRAMEBUFFER_VESA_MODE_11A=y
 CONFIG_VIDEO_IVYBRIDGE_IGD=y
 CONFIG_CONSOLE_SCROLL_LINES=5
 CONFIG_USE_PRIVATE_LIBGCC=y
+CONFIG_CMD_DHRYSTONE=y
 CONFIG_TPM=y

configs/chromebook_link_defconfig

@@ -69,4 +69,5 @@ CONFIG_FRAMEBUFFER_VESA_MODE_11A=y
 CONFIG_VIDEO_IVYBRIDGE_IGD=y
 CONFIG_CONSOLE_SCROLL_LINES=5
 CONFIG_USE_PRIVATE_LIBGCC=y
+CONFIG_CMD_DHRYSTONE=y
 CONFIG_TPM=y