x86: qemu: kconfig: Imply platform specific drivers

Imply Qemu-specific drivers in the platform Kconfig.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/cpu/qemu/Kconfig b/arch/x86/cpu/qemu/Kconfig
index 6f61744..ef0fd30 100644
--- a/arch/x86/cpu/qemu/Kconfig
+++ b/arch/x86/cpu/qemu/Kconfig
@@ -7,6 +7,10 @@
 config QEMU
 	bool
 	select ARCH_EARLY_INIT_R
+	imply ENV_IS_NOWHERE
+	imply E1000
+	imply SYS_NS16550
+	imply VIDEO_VESA
 
 if QEMU