[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, Angel Pons, 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 (#9).

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, 73 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/81/67681/9