[S] Change in coreboot[master]: soc/intel/ehl: Fix incorrect access to MAC_MDIO_DATA register

[Werner Zeh (Code Review)]

Attention is currently required from: Mario Scheithauer, Lean Sheng Tan.

Werner Zeh has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/68214 )

Change subject: soc/intel/ehl: Fix incorrect access to MAC_MDIO_DATA register
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Patch Set 2: Code-Review+1

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/68214/comment/7b3f12bb_822a8f03 
PS2, Line 9: Function 'setbits16' clears the data register first
setbits16 actually performs an 'OR' operation with the new data and the origin register entry. This now can lead to a reserved value in the register which can then lead to issues. So please just correct the commit and this CL is fine to go in.