Change in coreboot[master]: cpu/x86/smm,lib/cbmem_console: Enable CBMEMC when using DEBUG_SMI

[Julius Werner (Code Review)]

Attention is currently required from: Arthur Heymans, Raul Rangel, Nico Huber, Martin Roth, Tim Wawrzynczak, Rob Barnes, Karthik Ramasubramanian.
Julius Werner has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/62355 )

Change subject: cpu/x86/smm,lib/cbmem_console: Enable CBMEMC when using DEBUG_SMI
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Patch Set 2:

(3 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/62355/comment/23047253_d75242cd 
PS2, Line 24: and call that from smm_module_handler.
Maybe a nicer way would be to define an smm_get_cbmemc_buffer(void *buffer_out, size_t *size_out) function that the cbmemc_init() can call?

File src/cpu/x86/smm/smm_module_handler.c:

https://review.coreboot.org/c/coreboot/+/62355/comment/0a5e17fb_0b5d224b 
PS2, Line 17: size_t cbmemc_size;
Since these are global symbols, please namespace them a bit better (e.g. smm_cbmemc_buffer/smm_cbmemc_size or something like that).

File src/lib/cbmem_console.c:

https://review.coreboot.org/c/coreboot/+/62355/comment/0e28d461_e1e46b7a 
PS2, Line 90: 		extern size_t cbmemc_size;
These should probably go in some SMM-specific header and then be included here.