mb/asus/kgpe-d16|kcma-d8: Add ehci_async_data_cache CMOS option

Change-Id: I76a1047742369416b90e5c8bf307f85c02ae9bbb
Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com>
Reviewed-on: https://review.coreboot.org/14242
Tested-by: build bot (Jenkins)
Tested-by: Raptor Engineering Automated Test Stand <noreply@raptorengineeringinc.com>
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
4 files changed