Comment # 8 on bug 998440 from Takashi Iwai

The pinctrl-cherryview driver isn't needed only for mmc but for other things,
too.  Judging only from the mmcblk doesn't work reliably in that sense.

That said, basically it's correct to include this module when INT33FF is
present.
The driver shall be always loaded by every system that has INT33FF.  It bails
out when no corresponding component is found, so it's not visible in lsmod at
later point.  So it's just a matter of the timing and a slight increase of
initrd size, after all.