deskutils/plasma6-sddm-kcm: fix path to sddm configuration

PR:	284984
PR:	284986

deskutils/plasma6-sddm-kcm/Makefile

 PORTNAME=	sddm-kcm
 DISTVERSION=	${KDE_PLASMA_VERSION}
+PORTREVISION=	1
 CATEGORIES=	deskutils kde kde-plasma
 
 MAINTAINER=	kde@FreeBSD.org
@@ -12,4 +13,7 @@ USE_KDE=	archive auth colorscheme config configwidgets coreaddons i18n \
 USE_GL=		gl opengl
 USE_QT=		base declarative
 
+CMAKE_ARGS=	-DSDDM_CONFIG_FILE:FILEPATH=${LOCALBASE}/etc/sddm.conf \
+		-DSDDM_CONFIG_DIR:PATH=${LOCALBASE}/etc/sddm.conf.d
+
 .include <bsd.port.mk>