PC-BSD/trueos af1684dsys/modules/dtrace Makefile

Disconnect fasttrap from the 32-bit powerpc build.

An upcoming bug fix requires 64-bit atomics, which aren't implemented on
powerpc.  The powerpc port of fasttrap is incomplete anyway and doesn't
get loaded by dtraceall.ko on powerpc because of a missing dependency;
it's presumed that it's effectively unused.

Discussed with: jhibbits
MFC after:      2 weeks
DeltaFile
+2-3sys/modules/dtrace/Makefile
+2-31 files

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