2933 compiler warning gags need better granularity
Reviewed by: Eric Schrock <eric.schrock@delphix.com>
Approved by: Garrett D'Amore <garrett@damore.org>

6491034 dev: lint cleanup
6491042 devfs: lint cleanup
6491045 devinfo: lint cleanup

6470037 remove global disable of some potentially useful lint warnings from the kernel lint build

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