FreeBSD/src 075ac3b (r351389)sys/kern makesyscalls.sh

Reorganise conditionals to reduce duplication.

No functional change.

Obtained from:  CheriBSD
MFC after:      3 days
Sponsored by:   DARPA, AFRL
DeltaFile
+13-13sys/kern/makesyscalls.sh
+13-131 files

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