mainboard/asus: Add F2A85-M LE variant to F2A85-M.

The F2A85-M LE has less DRAM slots and needs different settings.
Additionally, the audio codec verb table is different.

Change-Id: I0e13c91fc924f4f9eac534fd13d57830654dd0aa
Signed-off-by: Tobias Diedrich <ranma+coreboot@tdiedrich.de>
Reviewed-on: http://review.coreboot.org/7356
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Rudolf Marek <r.marek@assembler.cz>