(1) Align to 64k for the CIS. Some cards don't like it when we aren't
aligned to a 64k boundary. I can't find anything in the standard
that requires this, but I have 1/2 dozen cards that won't work at
all unless I enable this.
(2) Sleep 1s before scanning the CIS. This may be a nop, but has little
harm.
(3) The CIS can be up to 4k in some weird, odd-ball edge cases. Since we
have limiters for when that's not the case, it does no harm to increase
it to 4k.
#1 was submitted, in a different form, by Carlos Velasco.
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