drm/cirrus: Fix cirrus drm driver for fbdev + qemu
Xorg fbdev driver requires smem_start/smem_len, otherwise it tries to map 0 bytes as video memory. Bugzilla: https://bugzilla.novell.com/show_bug.cgi?id=856760Signed-off-by: NMartin Koegler <martin.koegler@chello.at> Signed-off-by: NTakashi Iwai <tiwai@suse.de> Signed-off-by: NDave Airlie <airlied@redhat.com>
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