graphics/mesa-gallium-xa: Cleanup

- Specify license directly in this port.
- Order ONLY_FOR_ARCH

Sponsored by:   Beckhoff Automation GmbH & Co. KG

graphics/mesa-gallium-xa/Makefile

@@ -5,6 +5,12 @@ CATEGORIES=	graphics
 COMMENT=	Mesa Gallium XA state tracker
 WWW=		https://www.mesa3d.org/
 
+LICENSE=	MIT
+LICENSE_FILE=	${WRKSRC}/docs/license.rst
+
+ONLY_FOR_ARCHS=		amd64 i386
+ONLY_FOR_ARCHS_REASON=	used only by VMware supported architectures
+
 LIB_DEPENDS=	libLLVM-${LLVM_DEFAULT}.so:devel/llvm${LLVM_DEFAULT}
 
 USES=		xorg
@@ -13,9 +19,6 @@ USE_XORG=	xorgproto
 .include <bsd.port.options.mk>
 .include "${.CURDIR:H:H}/graphics/mesa-dri/Makefile.common"
 
-ONLY_FOR_ARCHS=		i386 amd64
-ONLY_FOR_ARCHS_REASON=	used only by VMware supported architectures
-
 MESON_ARGS+=	-Ddri-drivers="" \
 		-Dgallium-drivers="svga" \
 		-Dvulkan-drivers="" \