cpu-microcode-intel: Add knobs for RC RUN_DEPENDS and split files

Split UCODE files as well as dependency on sysutils/cpu-microcode-rc
are only required for use with cpucontrol(8) and update method two
respectively. The first method needs neither so we can spare a few
MiB and a superfluous port.
Given that the automatic update method one is superior, the RC knob
should be deprecated and removed eventually. At that point, split
UCODE files still will be useful for developers and if users want
to update the microcode without a reboot (but otherwise rely on the
loader for automatic updates, i. e. method one).

Reviewed by:	jrm (w/ style suggestions)
Approved by:	jrm (upcoming maintainer)
Differential Revision:	https://reviews.freebsd.org/D41904

sysutils/cpu-microcode-intel/Makefile

@@ -1,6 +1,7 @@
 PORTNAME=	microcode
 DISTVERSIONPREFIX=	microcode-
 DISTVERSION=	20230808
+PORTREVISION=	1
 CATEGORIES=	sysutils
 PKGNAMEPREFIX=	cpu-
 PKGNAMESUFFIX=	-intel
@@ -16,9 +17,20 @@ LICENSE_PERMS=	dist-mirror no-dist-sell pkg-mirror no-pkg-sell auto-accept
 
 ONLY_FOR_ARCHS=	amd64 i386
 
-RUN_DEPENDS=	${LOCALBASE}/etc/rc.d/microcode_update:sysutils/cpu-microcode-rc
-
 USES=		cpe
+
+OPTIONS_DEFINE=	RC SPLIT
+OPTIONS_DEFAULT=	${OPTIONS_DEFINE}
+OPTIONS_SUB=	yes
+
+RC_DESC=	Depend on RC script port (automatic update method two)
+SPLIT_DESC=	Install split files (for cpucontrol(8) and RC script)
+
+RC_IMPLIES=	SPLIT
+RC_RUN_DEPENDS=	${LOCALBASE}/etc/rc.d/microcode_update:sysutils/cpu-microcode-rc
+
+SPLIT_VARS_OFF=	NO_BUILD=yes
+
 CPE_PART=	o
 CPE_VENDOR=	intel
 CPE_PRODUCT=	microcode
@@ -33,16 +45,20 @@ NO_ARCH=	yes
 NO_WRKSUBDIR=	yes
 
 post-extract:
-	${CP} -p ${FILESDIR}/Makefile ${FILESDIR}/ucode-split.c ${WRKSRC}
-	${REINPLACE_CMD} 's|%%GH_TAGNAME%%|${GH_TAGNAME}|g' ${WRKSRC}/Makefile
 	${CAT} ${WRKSRC}/Intel-Linux-Processor-Microcode-Data-Files-${GH_TAGNAME}/intel-ucode/* \
 	  ${WRKSRC}/Intel-Linux-Processor-Microcode-Data-Files-${GH_TAGNAME}/intel-ucode-with-caveats/* \
 	  > ${WRKSRC}/intel-ucode.bin
 
+post-extract-SPLIT-on:
+	${CP} -p ${FILESDIR}/Makefile ${FILESDIR}/ucode-split.c ${WRKSRC}
+	${REINPLACE_CMD} 's|%%GH_TAGNAME%%|${GH_TAGNAME}|g' ${WRKSRC}/Makefile
+
 do-install:
-	${MKDIR} ${STAGEDIR}${DATADIR}/
-	${INSTALL_DATA} ${WRKSRC}/mcodes/* ${STAGEDIR}${DATADIR}/
 	${MKDIR} ${STAGEDIR}${FWDIR}
 	${INSTALL_DATA} ${WRKSRC}/intel-ucode.bin ${STAGEDIR}${FWDIR}/
 
+do-install-SPLIT-on:
+	${MKDIR} ${STAGEDIR}${DATADIR}/
+	${INSTALL_DATA} ${WRKSRC}/mcodes/* ${STAGEDIR}${DATADIR}/
+
 .include <bsd.port.mk>