Tweak the handling of "WITHOUT_LIBPTHREAD". Also remove the accidental

treatment of 'LIBKSE' as an "old style" knob.

Submitted by:	ru
Approved by:	re(kensmith)

Makefile

@@ -6,7 +6,7 @@ SUBDIR=	${_ggatec} \
 	${_ggated} \
 	ggatel
 
-.if ${MK_LIBPTHREAD} != "no" && (${MK_LIBTHR} != "no" || ${MK_LIBKSE} != "no")
+.if ${MK_LIBTHR} != "no" || ${MK_LIBKSE} != "no"
 _ggatec=	ggatec
 _ggated=	ggated
 .endif