staging: Remove flag FBINFO_FLAG_DEFAULT from fbdev drivers

The flag FBINFO_FLAG_DEFAULT is 0 and has no effect, as struct
fbinfo.flags has been allocated to zero by framebuffer_alloc(). So do
not set it.

Flags should signal differences from the default values. After cleaning
up all occurrences of FBINFO_DEFAULT, the token will be removed.

v2:
	* fix commit message (Miguel)

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Cc: Teddy Wang <teddy.wang@siliconmotion.com>
Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230715185343.7193-13-tzimmermann@suse.de

Author: tdz

drivers/staging/fbtft/fbtft-core.c

@@ -684,7 +684,7 @@ struct fb_info *fbtft_framebuffer_alloc(struct fbtft_display *display,
 	info->var.transp.offset =  0;
 	info->var.transp.length =  0;
 
-	info->flags =              FBINFO_FLAG_DEFAULT | FBINFO_VIRTFB;
+	info->flags =              FBINFO_VIRTFB;
 
 	par = info->par;
 	par->info = info;

drivers/staging/sm750fb/sm750.c

@@ -807,7 +807,6 @@ static int lynxfb_set_fbinfo(struct fb_info *info, int index)
 	info->screen_base = crtc->v_screen;
 	pr_debug("screen_base vaddr = %p\n", info->screen_base);
 	info->screen_size = line_length * var->yres_virtual;
-	info->flags = FBINFO_FLAG_DEFAULT | 0;
 
 	/* set info->fix */
 	fix->type = FB_TYPE_PACKED_PIXELS;