auxdisplay/ht16k33: Set FBINFO_VIRTFB flag
The ht16k33 driver operates on system memory. Mark the framebuffer accordingly. Helpers operating on the framebuffer memory will test for the presence of this flag. Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Cc: Miguel Ojeda <ojeda@kernel.org> Cc: Robin van der Gracht <robin@protonic.nl> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Acked-by: Miguel Ojeda <ojeda@kernel.org> Acked-by: Robin van der Gracht <robin@protonic.nl> Link: https://patchwork.freedesktop.org/patch/msgid/20231127131655.4020-10-tzimmermann@suse.de
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