Use new rpm macros: %autosetup and %make_build

%autosetup,  simplify %setup -q and %patch XX: [1]
%make_build, simplify %{_smp_mflags} macro:    [2]

[1]: https://rpm-software-management.github.io/rpm/manual/autosetup.html
[2]: https://fedoraproject.org/wiki/Changes/UseMakeBuildInstallMacro#Use_%make_build_and_%make_install_macros

Signed-off-by: Tao Liu <ltao@redhat.com>
Signed-off-by: Timothée Ravier <tim@siosm.fr>

irqbalance.spec

@@ -48,33 +48,12 @@ irqbalance is a daemon that evenly distributes IRQ load across
 multiple CPUs for enhanced performance.
 
 %prep
-%setup -q
+%autosetup -p1
-%patch1 -p1
-%patch2 -p1
-%patch3 -p1
-%patch4 -p1
-%patch5 -p1
-%patch6 -p1
-%patch7 -p1
-%patch8 -p1
-%patch9 -p1
-%patch10 -p1
-%patch11 -p1
-%patch12 -p1
-%patch13 -p1
-%patch14 -p1
-%patch15 -p1
-%patch16 -p1
-%patch17 -p1
-%patch18 -p1
-%patch19 -p1
-%patch20 -p1
-%patch21 -p1
 
 %build
 ./autogen.sh
 %configure
-CFLAGS="%{optflags}" make %{?_smp_mflags}
+%{make_build}
 
 %install
 install -D -p -m 0755 %{name} %{buildroot}%{_sbindir}/%{name}