pci: video: Set up the pixel-format field

Add this information to the handoff structure so that it is available to
U-Boot proper. Update bochs and the video handoff.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/pci/pci_rom.c b/drivers/pci/pci_rom.c
index 2753df2..3697ad0 100644
--- a/drivers/pci/pci_rom.c
+++ b/drivers/pci/pci_rom.c
@@ -347,6 +347,7 @@
 	case 32:
 	case 24:
 		uc_priv->bpix = VIDEO_BPP32;
+		uc_priv->format = VIDEO_X8B8G8R8;
 		break;
 	case 16:
 		uc_priv->bpix = VIDEO_BPP16;
@@ -392,6 +393,7 @@
 		uc_priv->ysize = ho->ysize;
 		uc_priv->line_length = ho->line_length;
 		uc_priv->bpix = ho->bpix;
+		uc_priv->format = ho->format;
 	} else {
 		bootstage_start(BOOTSTAGE_ID_ACCUM_LCD, "vesa display");
 		ret = dm_pci_run_vga_bios(dev, int15_handler,
@@ -438,6 +440,7 @@
 		ho->ysize = uc_priv->ysize;
 		ho->line_length = uc_priv->line_length;
 		ho->bpix = uc_priv->bpix;
+		ho->format = uc_priv->format;
 	}
 
 	return 0;