drm/gem-shmem: revert the 8-byte alignment constraint

Using drm_mode_size_dumb() to compute the size of dumb buffers introduced
an 8-byte alignment constraint on the pitch that wasn’t present before.
Let’s remove this constraint, which isn’t necessarily required and may
cause buffers to be allocated larger than needed.

Signed-off-by: Ludovic Desroches <[e-mail]>
Reviewed-by: Thomas Zimmermann <[e-mail]>
Fixes: 4977dcecb931 ("drm/gem-shmem: Compute dumb-buffer sizes with drm_mode_size_dumb()")
Signed-off-by: Thomas Zimmermann <[e-mail]>
Link: https://patch.msgid.link/[e-mail]

drivers/gpu/drm/drm_gem_shmem_helper.c

···
 {
 	int ret;
 
-	ret = drm_mode_size_dumb(dev, args, SZ_8, 0);
+	ret = drm_mode_size_dumb(dev, args, 0, 0);
 	if (ret)
 		return ret;