K 10
svn:author
V 3
kib
K 8
svn:date
V 27
2019-02-18T16:02:00.881752Z
K 7
svn:log
V 533
amd64: cleanup pmap_init_pat().

The pmap_works variable is always true for amd64.  Remove it, the
branch in the initialization taken when false, and corresponding
sysctl.

Remove pat_table[] local array, work on pat_index[] directly.

Collapse whole initialization to not override already assigned values.

Add comment explaining the choice for PAT4 and PAT7.

Reviewed by:	alc, markj
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
MFC note:	Leave the sysctl around
Differential revision:	https://reviews.freebsd.org/D19225

END