Change in coreboot[master]: soc/intel/ehl: Provide function to change PHY-to-MAC IRQ polarity

[Mario Scheithauer (Code Review)]

Attention is currently required from: Paul Menzel, Mario Scheithauer, Felix Held.
Hello build bot (Jenkins), Paul Menzel, Werner Zeh,

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

https://review.coreboot.org/c/coreboot/+/63888

to look at the new patch set (#15).

Change subject: soc/intel/ehl: Provide function to change PHY-to-MAC IRQ polarity
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soc/intel/ehl: Provide function to change PHY-to-MAC IRQ polarity

EHL MAC side expects a rising edge signal for an IRQ. Based on the
mainboard wiring it could be necessary to change the interrupt polarity.
This patch provides the functionality to invert a falling edge signal
that comes from an external PHY. The inverting can be activated via
devicetree parameter.

Change-Id: Ia314014c7cacbeb72629c773c8c0bb5f002a3f54
Signed-off-by: Mario Scheithauer 
---
M src/soc/intel/elkhartlake/chip.h
M src/soc/intel/elkhartlake/include/soc/tsn_gbe.h
M src/soc/intel/elkhartlake/tsn_gbe.c
3 files changed, 125 insertions(+), 5 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/88/63888/15