drm/vc4: fix error code in vc4_check_tex_size()

The vc4_check_tex_size() function is supposed to return false on error
but this error path accidentally returns -ENODEV (which means true).

Fixes: 30f8c74c ("drm/vc4: Warn if some v3d code is run on BCM2711")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/YrMKK89/viQiaiAg@kili