[S] Change in coreboot[master]: soc/intel/cmn/block/cse: Support sending EOP from payload

[Paul Menzel (Code Review)]

Attention is currently required from: Kapil Porwal.

Paul Menzel has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/74765 )

Change subject: soc/intel/cmn/block/cse: Support sending EOP from payload
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Patch Set 2:

(3 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/74765/comment/32102f94_8b0e7e94 
PS2, Line 9: Add support for sending EOP from payload
Please elaborate. Please state the problem, and explain the solution.

File src/soc/intel/common/block/cse/Kconfig:

https://review.coreboot.org/c/coreboot/+/74765/comment/04c1e3fb_a9c220ce 
PS2, Line 117: Use this config to send End Of Post (EOP) using payload. coreboot supplies a function
             : 	  pointer, to send EOP, to payload via a coreboot table.
Please elaborate. When should a developer select this?

File src/soc/intel/common/block/cse/cse_eop.c:

https://review.coreboot.org/c/coreboot/+/74765/comment/6cfd7e8f_1889ff27 
PS2, Line 310: lb_
What is lb_ used for?