Change in coreboot[master]: Add console deinit API, use in SMM handler

[Rocky Phagura (Code Review)]

Attention is currently required from: Nico Huber, Johnny Lin, Stefan Reinauer, Paul Menzel, Rocky Phagura, Christian Walter, Angel Pons, Arthur Heymans, Kyösti Mälkki, Peter Tsung Ho Wu, Deomid "rojer" Ryabkov, Ron Minnich.
Rocky Phagura has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/56386 )

Change subject: Add console deinit API, use in SMM handler
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Patch Set 11:

(1 comment)

Commit Message:

https://review.coreboot.org/c/coreboot/+/56386/comment/f9878a4d_bd32cf19 
PS11, Line 14: on an OCP Delta Lake server: uart8250_init disables interrupts because it
> So uart8250_init() is called via console_init() in smi_handler() / smm_handler_start() (depending on […]

Patrick - just to provide some more context...when the OS takes over the console it switches to interrupt mode while coreboot uses polling mode. So when entering SMM, coreboot switches to polling mode but upon exiting SMM it needs to restore interrupts, otherwise the console will no longer work. The rule in SMM is to restore the system state otherwise the OS has no idea what happened. So this patch essentially restores console interrupts.