MFC r353871

MFC r353871
Record prior MFC of r353408

r353408:
Fix -DNO_CLEAN build across r353340 and r353381

opensolaris_atomic.S is now only used on i386 with opensolaris_atomic.c
used on other platforms.  After r353381 it doesn't exist on those
platforms so the stale dependency would result in a build error.

r353871:
Additional fix for -DNO_CLEAN build across r353340 and r353381

opensolaris_atomic.S is now only used on i386 with opensolaris_atomic.c
used on other platforms.  After r353381 it doesn't exist on those
platforms so the stale dependency would result in a build error.

r353408 addressed this issue for cddl/lib/libzpool, but it persisted
with the opensolaris and zfs modules.