- Don't take an account of locked memory for current process in vslock(9).
- Don't take an account of locked memory for current process in vslock(9).

There are two consumers of vslock(9): sysctl code and drm driver.  These
consumers are using locked memory as transient memory, it doesn't belong
to a process's memory.

Suggested by:	avg
Reviewed by:	alc
Approved by:	kib (mentor)
MFC after:	2 weeks

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