rk3399: add ability to configure SPI5

Hardware / Coreboot - Vadim Bendebury [chromium.org] - 8 June 2016 16:20 UTC

This defines mux settings for the GPIO bank responsible for SPI interface #5.

BRANCH=none BUG=chrome-os-partner:51537 TEST=with the rest of the patches applied it is possible to communicate with the EC on gru: pressing Ctrl-U during boot allows to start Chrome OS from the SD card.

Change-Id: Ibc2293b5662892f7b275434f9a672ef68edf4f9e

5554d1c rk3399: add ability to configure SPI5
src/soc/rockchip/rk3399/include/soc/grf.h | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)

Upstream: review.coreboot.org

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