firmware: Drop unused pages field from struct firmware

firmware: Drop unused pages field from struct firmware

The struct firmware contains a page table pointer that was used only
internally in the past.  Since the actual page tables are referred
from struct fw_priv and should be never from struct firmware, we can
drop this unused field gracefully.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Luis Chamberlain <mcgrof@kernel.org>
Link: https://lore.kernel.org/r/20200415164500.28749-1-tiwai@suse.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>