Logo居中显示

修改drivers/video/fbmem.c 文件：
static int fb_show_logo_line函数中：
将
//image.dx = 0;
//image.dy = y;
改为：
image.dx = (info->var.xres/2)-(logo->width/2); //++by zjp @2013
image.dy = (info->var.yres/2)-(logo->height/2); //++by zjp @2013