hw: vmware_vga: don't return cursorx when the driver asks for cursory register

hello qemu-*@nongnu.org, this is my first contribution. apologies if
something is incorrect.

this patch fixes vmware_vga.c so that it actually returns the cursory
register when asked for, instead of cursorx.

Signed-off-by: Nicolas Owens <mischief@offblast.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>

hw/display/vmware_vga.c

@@ -863,7 +863,7 @@ static uint32_t vmsvga_value_read(void *opaque, uint32_t address)
         break;
 
     case SVGA_REG_CURSOR_Y:
-        ret = s->cursor.x;
+        ret = s->cursor.y;
         break;
 
     case SVGA_REG_CURSOR_ON: