Uncomment the call to cpu_idcache_wbinv_all() after the MMU has been enabled. It has been commented out for a reason I forgot but I suspect does not apply anymore. Technically speaking it's not required to do it, has the data and the instruction cache have been disabled in _start(). However, it may change in the future, so I don't want to rely on this behavior.
Uncomment the call to cpu_idcache_wbinv_all() after the MMU has been
enabled. It has been commented out for a reason I forgot but I suspect
does not apply anymore.
Technically speaking it's not required to do it, has the data and the
instruction cache have been disabled in _start(). However, it may change
in the future, so I don't want to rely on this behavior.

Submitted by:	kevlo

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