Change in coreboot[master]: [WIP] drivers/intel/fsp2_0: Add FSP 2.3 support

[Werner Zeh (Code Review)]

Attention is currently required from: Anil Kumar K, Subrata Banik, Paul Menzel, Andrey Petrov, Patrick Rudolph.
Werner Zeh has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/59324 )

Change subject: [WIP] drivers/intel/fsp2_0: Add FSP 2.3 support
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Patch Set 14:

(3 comments)

File src/drivers/intel/fsp2_0/Kconfig:

https://review.coreboot.org/c/coreboot/+/59324/comment/a32fbfc0_0c34b766 
PS14, Line 38:   Features added into FSP 2.3 specification that impact coreboot are:
             : 	  1. FSP_INFO_HEADER changes
             : 	    Updated SpecVersion from 0x22 to 0x23
             : 	    Updated HeaderRevision from 5 to 6
             : 	    Added ExtendedImageRevision
             : 	    FSP_INFO_HEADER length changed to 0x50
             : 	  2. Added FSP_NON_VOLATILE_STORAGE_HOB2
I am not sure that this is a helpful text in the Kconfig menu. I would rather tend to keep it clean here and describe the changes in the commit.

File src/drivers/intel/fsp2_0/header_display.c:

https://review.coreboot.org/c/coreboot/+/59324/comment/2fce06f9_a26655c6 
PS14, Line 11: externded
extended

https://review.coreboot.org/c/coreboot/+/59324/comment/2c08f81c_76a05915 
PS14, Line 22: 		((ext_revision.rev.revision << 8) | revision.rev.revision),
             : 			((ext_revision.rev.bld_num << 8) | revision.rev.bld_num));
You fill in the extended revision number only if FSP2.3 config swicth is set but print it here unconditionally. At least I would like to have some known init values for this field so that we do not have gibberish printed here for non FSP2.3 paths.