Mk/Uses/mpi.mk: revert c9a111c1f2 by marking MPICH libraries as private

Mark the libraries brought by MPICH dependencies as private, in order to
avoid to register them.

Patch provided by tijl@.

Mk/Uses/mpi.mk

@@ -28,12 +28,7 @@ USES+=	pkgconfig
 .  endif
 
 .  if ${mpi_ARGS} == mpich
-LIB_DEPENDS+=	libmpich.so:net/mpich	\
-		libhwloc.so:devel/hwloc2	\
-		libjson-c.so:devel/json-c	\
-		libfabric.so:net/libfabric	\
-		libze_loader.so:devel/level-zero\
-		libepoll-shim.so:devel/libepoll-shim
+LIB_DEPENDS+=	libmpich.so:net/mpich
 MPI_HOME=	${LOCALBASE}
 MPI_LIBS+=	`pkgconf --libs mpich`
 .    if ${USES:Mfortran}

net/mpich/Makefile

@@ -1,5 +1,6 @@
 PORTNAME=	mpich
 PORTVERSION=	3.4.3
+PORTREVISION=	1
 CATEGORIES=	net parallel
 MASTER_SITES=	https://www.mpich.org/static/downloads/${DISTVERSION}/
 

net/mpich/files/patch-src-packaging-pkgconfig-mpich.pc.in

@@ -0,0 +1,12 @@
+--- src/packaging/pkgconfig/mpich.pc.in.orig	2021-12-16 16:59:29 UTC
++++ src/packaging/pkgconfig/mpich.pc.in
+@@ -9,7 +9,8 @@ Requires:
+ Version: @MPICH_VERSION@
+ URL: http://www.mcs.anl.gov/research/projects/mpich
+ Requires:
+-Libs: @WRAPPER_C_DYNAMIC_LOADING_FLAGS@ @WRAPPER_LDFLAGS@ -L${libdir} -l@MPILIBNAME@ @LPMPILIBNAME@ @WRAPPER_LIBS@
++Libs: @WRAPPER_C_DYNAMIC_LOADING_FLAGS@ @WRAPPER_LDFLAGS@ -L${libdir} -l@MPILIBNAME@ @LPMPILIBNAME@
++Libs.private: @WRAPPER_LIBS@
+ Cflags: @WRAPPER_CPPFLAGS@ @WRAPPER_CFLAGS@ -I${includedir}
+ 
+ # pkg-config does not understand Cxxflags, etc. So we allow users to