rc.d: liberate powerd from ACPI dependency

For instance, many non-ACPI ARM systems have CPU power / frequency
levels.

Discussed with:	manu
MFC after:	1 week

libexec/rc/rc.d/Makefile

@@ -78,6 +78,7 @@ CONFS=	DAEMON \
 	pf \
 	pflog \
 	pfsync \
+	powerd \
 	ppp \
 	pppoed \
 	pwcheck \
@@ -135,10 +136,6 @@ ACPI=		power_profile
 ACPIPACKAGE=	acpi
 .endif
 
-.if ${MK_ACPI} != "no" || ${MK_APM} != "no"
-CONFS+=		powerd
-.endif
-
 .if ${MK_APM} != "no"
 CONFGROUPS+=	APM
 APM+=		apm