x86: video: Add a driver for QEMU bochs emulation

Bochs is convenient with QEMU on x86 since it does not require a video
BIOS. Add a driver for it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index f99d7e3..a926370 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -45,6 +45,7 @@
 obj-$(CONFIG_SANDBOX_OSD) += sandbox_osd.o
 obj-$(CONFIG_VIDEO_ARM_MALIDP) += mali_dp.o
 obj-$(CONFIG_VIDEO_BCM2835) += bcm2835.o
+obj-$(CONFIG_VIDEO_BOCHS) += bochs.o
 obj-$(CONFIG_VIDEO_BROADWELL_IGD) += broadwell_igd.o
 obj-$(CONFIG_VIDEO_COREBOOT) += coreboot.o
 obj-$(CONFIG_VIDEO_DW_HDMI) += dw_hdmi.o