[M] Change in coreboot[master]: drivers/i2c/ptn3460: Add early init option

[Jan Samek (Code Review)]

Attention is currently required from: Tim Wawrzynczak, Paul Menzel, Uwe Poeche, Arthur Heymans, Jan Samek.

Hello build bot (Jenkins), Mario Scheithauer, Angel Pons, Uwe Poeche, Arthur Heymans, Werner Zeh,

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/coreboot/+/67681

to look at the new patch set (#6).

Change subject: drivers/i2c/ptn3460: Add early init option
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drivers/i2c/ptn3460: Add early init option

Create Kconfig options and boot state machine callback in ramstage for
an early initialization of the PTN3460 DP-to-LVDS bridge. This allows
showing the bootsplash screen on mainboards utilizing this chip during
the PCI device enumeration.

BUG=none
TEST=Select PTN3460_EARLY_INIT config switch in mainboard Kconfig and
check the log for "Attempting PTN3460 early init" message. If the
board (e.g. siemens/mc_apl7 in this case) is also configured for
showing the bootsplash logo, it should be now visible.

Change-Id: I5424d062b3fb63c78cfced3971376353be11c504
Signed-off-by: Jan Samek 
---
M src/drivers/i2c/ptn3460/Kconfig
M src/drivers/i2c/ptn3460/ptn3460.c
2 files changed, 71 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/81/67681/6