Since APM is a legacy technology, that won't be adapted to other

platforms, move the test for i386 from the Makefile to powerd.c.  The
powerpc specific checks are already done this way...

usr.sbin/powerd/Makefile

@@ -6,8 +6,4 @@ MAN=	powerd.8
 DPADD=	${LIBUTIL}
 LDADD=	-lutil
 
-.if ${MACHINE_ARCH} == "i386"
-CFLAGS+=-DUSE_APM
-.endif
-
 .include <bsd.prog.mk>

usr.sbin/powerd/powerd.c

@@ -46,6 +46,10 @@ __FBSDID("$FreeBSD$");
 #include <string.h>
 #include <unistd.h>
 
+#ifdef __i386__
+#define USE_APM
+#endif
+
 #ifdef USE_APM
 #include <machine/apm_bios.h>
 #endif