Update AppleMacbook wiki

[Benjamin Kaduk]

On Wed, Oct 11, 2017 at 12:20:52PM +0200, Johannes Lundberg wrote:
> Hi
> 
> (cc: koobs because he last updated the wiki page)
> 
> I have a 2014 Macbook Pro Retina 15" which suffers from ahci msi
> related timeouts when writing to the internal storage. (sorry don't
> have the error message now...)
> 
> The fix for this (afaik) is
> 
> in boot loader prompt do
> 
> set hint.ahci.0.msi=0
> 
> in order to install freebsd, and after install add to /boot/loader.conf
> 
> hint.ahci.0.msi="0"
> 
> Not sure how common this is but maybe it can be added to the wiki?

Sure, added a note in the FAQ.

-Ben