veyron_brain: Add basic HDMI support

Hardware / Coreboot - David Hendricks [chromium.org] - 6 July 2015 02:40 UTC

This adds a configure_hdmi() function that drives the HDMI enable output high and configures the iomux. Calls to PMIC functions to enable HDMI power are moved here as well.

BUG=none BRANCH=none TEST=with follow-up patches, we now get a dev screen on Brain.

Change-Id: Ifd2648376c789fb29c9e2e4ab6bdb10ca439e4a2

51e73c3 veyron_brain: Add basic HDMI support
src/mainboard/google/veyron_brain/devicetree.cb | 1 +
src/mainboard/google/veyron_brain/mainboard.c | 11 +++++++++++
2 files changed, 12 insertions(+)

Upstream: review.coreboot.org

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