kbuild: rpm-pkg: use %{makeflags} to pass common Make options

This is useful to pass more common Make options.
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/package/mkspec

@@ -39,6 +39,7 @@ EXCLUDES="$RCS_TAR_IGNORE --exclude=*vmlinux* --exclude=*.mod \
 #  $M: this line is enabled only when CONFIG_MODULES is enabled
 sed -e '/^DEL/d' -e 's/^\t*//' <<EOF
 %{!?make: %define make make}
+%define makeflags %{?_smp_mflags}
 
 	Name: kernel
 	Summary: The Linux Kernel
@@ -91,19 +92,19 @@ $S	cp %{SOURCE1} .config
 $S	patch -p1 < %{SOURCE2}
 $S
 $S	%build
-$S	%{make} %{?_smp_mflags} KERNELRELEASE=$KERNELRELEASE KBUILD_BUILD_VERSION=%{release}
+$S	%{make} %{makeflags} KERNELRELEASE=$KERNELRELEASE KBUILD_BUILD_VERSION=%{release}
 $S
 	%install
 	mkdir -p %{buildroot}/boot
 	%ifarch ia64
 	mkdir -p %{buildroot}/boot/efi
-	cp \$(%{make} -s image_name) %{buildroot}/boot/efi/vmlinuz-$KERNELRELEASE
+	cp \$(%{make} %{makeflags} -s image_name) %{buildroot}/boot/efi/vmlinuz-$KERNELRELEASE
 	ln -s efi/vmlinuz-$KERNELRELEASE %{buildroot}/boot/
 	%else
-	cp \$(%{make} -s image_name) %{buildroot}/boot/vmlinuz-$KERNELRELEASE
+	cp \$(%{make} %{makeflags} -s image_name) %{buildroot}/boot/vmlinuz-$KERNELRELEASE
 	%endif
-$M	%{make} %{?_smp_mflags} INSTALL_MOD_PATH=%{buildroot} modules_install
-	%{make} %{?_smp_mflags} INSTALL_HDR_PATH=%{buildroot}/usr headers_install
+$M	%{make} %{makeflags} INSTALL_MOD_PATH=%{buildroot} modules_install
+	%{make} %{makeflags} INSTALL_HDR_PATH=%{buildroot}/usr headers_install
 	cp System.map %{buildroot}/boot/System.map-$KERNELRELEASE
 	cp .config %{buildroot}/boot/config-$KERNELRELEASE
 $S$M	rm -f %{buildroot}/lib/modules/$KERNELRELEASE/build