ryu: Add mainboard_init_xxx functions to get it building again

Rush has its EC on SPI, and Ryu has it on I2C, so need both
mainboard_init_ec_spi and mainboard_init_ec_i2c in both builds,
due to romstage.c being in the common tegra132 subdir.

BUG=none
BRANCH=rush_ryu
TEST=Built both rush and rush_ryu images OK. Will try to
boot on Ryu later.

Change-Id: Iddbf9e9f6de7ba7244f9dd2e810fb6178937c85a
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 4d8b81717c366d19b43964bed3c4047598db4495
Original-Change-Id: I48d9530697d5669177ecd9ba3c34360197002003
Original-Signed-off-by: Tom Warren <twarren@nvidia.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/210595
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Commit-Queue: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: http://review.coreboot.org/8900
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
5 files changed