Fix page length reported for Block Limits VPD page.

(cherry picked from commit 16592938e6b261859d1a8a6101db3abc3d3b22be)
Intel S3700 SSD quirks

Conflicts:
	sys/cam/scsi/scsi_da.c
ata_da: handle ATA_SF_ENAB_WCACHE
ZFS/GFS handling fixes
Applied http://people.freebsd.org/~avg/l2arc-b_tmp_cdata-diag.2.patch
Disabled arc_event_lowmem vm_lowmem handler