Use corect depth from DisplaySurface in vmware_vga.c

Hello,
for what I can tell, there is no way for vmware_vga to work correctly
right now. It assumes that the framebuffer bits-per-pixel and the one
from the DisplaySurface are identical (it uses directly the VRAM from
vga.c), but it always assumes 3 bytes per pixel, which is never possible
with the current version of DisplaySurface.
Attached patch fixes that by using ds_get_bits_per_pixel.
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>

hw/vmware_vga.c

@@ -923,7 +923,7 @@ static void vmsvga_reset(struct vmsvga_state_s *s)
     s->width = -1;
     s->height = -1;
     s->svgaid = SVGA_ID;
-    s->depth = 24;
+    s->depth = ds_get_bits_per_pixel(s->vga.ds);
     s->bypp = (s->depth + 7) >> 3;
     s->cursor.on = 0;
     s->redraw_fifo_first = 0;
@@ -1126,8 +1126,6 @@ static void vmsvga_init(struct vmsvga_state_s *s, int vga_ram_size)
     s->scratch_size = SVGA_SCRATCH_SIZE;
     s->scratch = (uint32_t *) qemu_malloc(s->scratch_size * 4);
 
-    vmsvga_reset(s);
-
 #ifdef EMBED_STDVGA
     vga_common_init((VGAState *) s, vga_ram_size);
     vga_init((VGAState *) s);
@@ -1142,6 +1140,8 @@ static void vmsvga_init(struct vmsvga_state_s *s, int vga_ram_size)
                                      vmsvga_screen_dump,
                                      vmsvga_text_update, &s->vga);
 
+    vmsvga_reset(s);
+
 #ifdef CONFIG_BOCHS_VBE
     /* XXX: use optimized standard vga accesses */
     cpu_register_physical_memory(VBE_DISPI_LFB_PHYSICAL_ADDRESS,