Use 'rdma-core-devel' not 'libibverbs-devel' for dependencies

rdma-core-devel Provides: libibverbs-devel, but it does not
Provides: libibverbs-devel%{_isa}, which hwloc-devel wants to
depend on; it *does* provide rdma-core-devel%{_isa}, so let's
just switch to that name.

hwloc.spec

@@ -1,7 +1,7 @@
 Summary:   Portable Hardware Locality - portable abstraction of hierarchical architectures
 Name:      hwloc
 Version:   1.11.5
-Release:   5%{?dist}
+Release:   6%{?dist}
 License:   BSD
 Group:     Applications/System
 URL:       http://www.open-mpi.org/projects/hwloc/
@@ -21,7 +21,7 @@ BuildRequires: autoconf automake libtool
 BuildRequires: desktop-file-utils
 %ifnarch s390 s390x %{arm}
 BuildRequires: numactl-devel
-BuildRequires: libibverbs-devel
+BuildRequires: rdma-core-devel
 %endif
 
 %description
@@ -43,7 +43,7 @@ Summary:   Headers and shared development libraries for hwloc
 Group:     Development/Libraries
 Requires:  %{name}-libs%{?_isa} = %{version}-%{release}
 %ifnarch s390 s390x %{arm}
-Requires:  libibverbs-devel%{?_isa}
+Requires:  rdma-core-devel%{?_isa}
 %endif
 
 %description devel
@@ -148,6 +148,9 @@ make check
 %{_libdir}/hwloc*
 
 %changelog
+* Wed Aug 23 2017 Adam Williamson <awilliam@redhat.com> - 1.11.5-6
+- Use 'rdma-core-devel' not 'libibverbs-devel' for dependencies
+
 * Wed Aug 23 2017 Adam Williamson <awilliam@redhat.com> - 1.11.5-5
 - Disable libibverbs support on 32-bit ARM (#1484155)