4840 ddi_dma_mem_alloc()/ddi_dma_mem_free() are O(n**2)
Reviewed by: Michael Speer <michael.speer@pluribusnetworks.com>
Reviewed by: Tycho Nightingale <tycho.nightingale@pluribusnetworks.com>
Reviewed by: Rafael Vanoni <rafael.vanoni@pluribusnetworks.com>
Reviewed by: Josef 'Jeff' Sipek <jeffpc@josefsipek.net>
Reviewed by: Robert Mustacchi <rm@joyent.com>
Approved by: Dan McDonald <danmcd@omniti.com>
	[illumos-gate merge]

commit a7175e2030b8105e954880bdc63bf0e3dba62d2c
    4840 ddi_dma_mem_alloc()/ddi_dma_mem_free() are O(n**2)