cpu/allwinner/a10: Add basic TWI (I²C) driver

Change-Id: I11b10301199e5ff1a45d9b7d2958cc7b6667a29c
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Reviewed-on: http://review.coreboot.org/4588
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
3 files changed