[coreboot-gerrit] Change in coreboot[master]: console/printk: Add console_mutex

[Rob Barnes (Code Review)]

Attention is currently required from: Raul Rangel, Julius Werner.
Rob Barnes has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/58981 )

Change subject: console/printk: Add console_mutex
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Patch Set 3:

(1 comment)

File src/console/printk.c:

https://review.coreboot.org/c/coreboot/+/58981/comment/bf3b38ce_dd82cd41 
PS3, Line 86: 	thread_mutex_lock(&console_mutex);
Should this be wrapped in an if/else? i.e. do we need to spin_lock and thread_mutex_lock if spin_locks are enabled?