ide_pci_generic: add quirk for Netcell ATA RAID

ide_pci_generic: add quirk for Netcell ATA RAID

We need to explicitly mark words 85-87 as valid ones since
firmware doesn't do it.

This should fix support for LBA48 and FLUSH CACHE [EXT] command
which stopped working after we applied more strict checking of
identify words in:

	commit 99287db7a8e1afb5e5f0ddbdf73e0d7f9a0195bd
	("ide: idedisk_supports_lba48() -> ata_id_lba48_enabled()")

and

	commit 4360a23bfc6a787ea3385283766026b9e436b67e
	("ide: ide_id_has_flush_cache() -> ata_id_flush_enabled()")

Reported-and-tested-by: "Trevor Hemsley" <trevor.hemsley@ntlworld.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>