[L] Change in coreboot[main]: mb/dell: Add OptiPlex 7020/9020 port

[Máté Kukri (Code Review)]

Attention is currently required from: Arthur Heymans, Michael Büchler, Nicholas Chin, Nico Huber, Paul Menzel, ilikenwf, nat ✨.

Máté Kukri has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/55232?usp=email )

Change subject: mb/dell: Add OptiPlex 7020/9020 port
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Patch Set 33:

(4 comments)

File src/mainboard/dell/optiplex_9020/Kconfig:

https://review.coreboot.org/c/coreboot/+/55232/comment/69b3d83e_9fcd40fc :
PS32, Line 10: select HAVE_OPTION_TABLE
             : 	select HAVE_CMOS_DEFAULT
> Swap these to keep the list in alphabetical order

Done

File src/mainboard/dell/optiplex_9020/board_info.txt:

https://review.coreboot.org/c/coreboot/+/55232/comment/bd45796b_9aaa584d :
PS32, Line 3: 2014
> Nit: The 9020 seems to have been released in 2013 and the 7020 in 2014

Done

File src/mainboard/dell/optiplex_9020/cmos.default:

PS32:
> Needs an SPDX header, refer to commit e623845df6 (mb/*: Add SPDX headers for cmos. […]

Done

File src/mainboard/dell/optiplex_9020/romstage.c:

https://review.coreboot.org/c/coreboot/+/55232/comment/9833b862_b84318dc :
PS32, Line 3: #include <northbridge/intel/haswell/haswell.h>
> This doesn't seem to be necessary. Seems to build fine if I remove it.

Done