AMD Agesa macro expansion fix

AMD Agesa macro expansion fix

This change fixes the use of a macro that was
previously modified to fix a warning.  The macro
was used in a manner that doubly incremented a
pointer.  The pointer increment was removed from
the macro call and moved elsewhere.  In addition,
an unused macro was removed from both Family 12
and Family 14 code.

Change-Id: I577794bbc55d18f21170dda1d0bbdc6d776ce392
Signed-off-by: Frank Vibrans <frank.vibrans@amd.com>
Signed-off-by: efdesign98 <efdesign98@gmail.com>
Reviewed-on: http://review.coreboot.org/217
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>