Currently, it's difficult to find all the workarounds that are
applied when running on EFI, because they're littered throughout
various code paths. This change moves all of them into a separate
file with the hope that it will be come the single location for all
our well documented quirks.

Signed-off-by: Saurabh Tangri <saurabh.tangri@intel.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>