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, Angel Pons, Felix Held.
Mario Scheithauer has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/63888 )

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

Patch Set 15:

(6 comments)

File src/soc/intel/elkhartlake/chip.h:

https://review.coreboot.org/c/coreboot/+/63888/comment/74e37dbb_ca70e077 
PS14, Line 487: PchTsnPhyIrqEdge
> Could we please avoid CamelCase names?

Done

File src/soc/intel/elkhartlake/include/soc/tsn_gbe.h:

https://review.coreboot.org/c/coreboot/+/63888/comment/2f4306ca_f37e8611 
PS14, Line 16:
> nit: Gerrit says this is a tab?

Done

https://review.coreboot.org/c/coreboot/+/63888/comment/5aad049c_3b9d76d1 
PS14, Line 36: int32_t
> enum cb_err

Done

File src/soc/intel/elkhartlake/tsn_gbe.c:

https://review.coreboot.org/c/coreboot/+/63888/comment/4c1e90aa_7210b937 
PS14, Line 31: int32_t
> enum cb_err

Done

https://review.coreboot.org/c/coreboot/+/63888/comment/76c00938_7130c8ba 
PS14, Line 37: read32((void *)
> Also see CB:64398 which I just made, which I made with this commit in mind.

when I use read32p, I get a cast error...

src/soc/intel/elkhartlake/tsn_gbe.c:37:37: error: passing argument 1 of 'read32p' makes integer from pointer without a cast [-Werror=int-conversion]
   37 |                 if (!(read32p((base + TSN_MAC_MDIO_ADR)) & TSN_MAC_GMII_BUSY))
      |                               ~~~~~~^~~~~~~~~~~~~~~~~~~
      |                                     |
      |                                     void *

https://review.coreboot.org/c/coreboot/+/63888/comment/23083d93_5903cdc2 
PS14, Line 106: 	uintptr_t io_mem_base = gbe_tsn_res->base;
> Hmmm, using `void *` type for the base address would avoid a bunch of type casts. […]

Done