[L] Change in flashrom[main]: cli_classic: Add rpmc command support

[Peter Marheine (Code Review)]

Attention is currently required from: Anastasia Klimchuk, Matti Finder.

Peter Marheine has posted comments on this change by Matti Finder. ( https://review.coreboot.org/c/flashrom/+/84840?usp=email )

Change subject: cli_classic: Add rpmc command support
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Patch Set 3:

(2 comments)

File cli_classic.c:

https://review.coreboot.org/c/flashrom/+/84840/comment/b754461a_59e9f84e?usp... :
PS2, Line 159: 	printf(".\n\nYou can specify one of -h, -R, -L, "
> Do you think the way I extended it is ok. Otherwise I think the message would get too long. […]

Yeah, that seems good. It's clear from how we put those in their own section what options the RPMC commands are.

File cli_classic.c:

https://review.coreboot.org/c/flashrom/+/84840/comment/4843cd38_e29f3eb8?usp... :
PS3, Line 165: 		 ", the RPMC commands"
"a RPMC command" since specifying more than one in a single invocation is an error.