azalia: Move shared variable to separate file

Change-Id: Icf46ad1397c67478887c80a627b8f4eb0a67e542
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/6695
Tested-by: build bot (Jenkins)
Reviewed-by: Idwer Vollering <vidwer@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
macbook11: New mainboard (macbook21 clone)

Tested by marcus.

Change-Id: Ifce2018ef49619b36fb07e5345d70c358a0397e4
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/6698
Tested-by: build bot (Jenkins)
Reviewed-by: Francis Rowe <info@gluglug.org.uk>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>