x86: qemu: Convert to use driver model keyboard

Convert to use driver model keyboard on QEMU.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/include/configs/qemu-x86.h b/include/configs/qemu-x86.h
index e3e1237..e3445dd 100644
--- a/include/configs/qemu-x86.h
+++ b/include/configs/qemu-x86.h
@@ -19,7 +19,7 @@
 
 #define CONFIG_PCI_PNP
 
-#define CONFIG_STD_DEVICES_SETTINGS	"stdin=serial,vga\0" \
+#define CONFIG_STD_DEVICES_SETTINGS	"stdin=serial,i8042-kbd\0" \
 					"stdout=serial,vga\0" \
 					"stderr=serial,vga\0"