Preallocate some space to return the scan results, some drivers do not properly pass back the desired buffer length. This fixes scanning with the Marvell 88W8335 and BCM4328 wireless cards.
Preallocate some space to return the scan results, some drivers do not properly
pass back the desired buffer length. This fixes scanning with the Marvell
88W8335 and BCM4328 wireless cards.

PR:		kern/118370
Submitted by:	Weongyo Jeong
Tested by:	Ed Schouten

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