kbuild: deb-pkg: remove the CONFIG_MODULES check in buildeb

When CONFIG_MODULES is disabled for ARCH=um, 'make (bin)deb-pkg' fails
with an error like follows:

  cp: cannot create regular file 'debian/linux-image/usr/lib/uml/modules/6.4.0-rc2+/System.map': No such file or directory

Remove the CONFIG_MODULES check completely so ${pdir}/usr/lib/uml/modules
will always be created and modules.builtin.(modinfo) will be installed
under it for ARCH=um.

Fixes: b611daa ("kbuild: deb-pkg: split image and debug objects staging out into functions")
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>

scripts/package/builddeb

@@ -63,17 +63,13 @@ install_linux_image () {
 	fi
 
 	${MAKE} -f ${srctree}/Makefile INSTALL_MOD_PATH="${pdir}" modules_install
-	if is_enabled CONFIG_MODULES; then
-		rm -f "${pdir}/lib/modules/${KERNELRELEASE}/build"
-		rm -f "${pdir}/lib/modules/${KERNELRELEASE}/source"
-		if [ "${SRCARCH}" = um ] ; then
-			mkdir -p "${pdir}/usr/lib/uml/modules"
-			mv "${pdir}/lib/modules/${KERNELRELEASE}" "${pdir}/usr/lib/uml/modules/${KERNELRELEASE}"
-		fi
-	fi
+	rm -f "${pdir}/lib/modules/${KERNELRELEASE}/build"
+	rm -f "${pdir}/lib/modules/${KERNELRELEASE}/source"
 
 	# Install the kernel
 	if [ "${ARCH}" = um ] ; then
+		mkdir -p "${pdir}/usr/lib/uml/modules"
+		mv "${pdir}/lib/modules/${KERNELRELEASE}" "${pdir}/usr/lib/uml/modules/${KERNELRELEASE}"
 		mkdir -p "${pdir}/usr/bin" "${pdir}/usr/share/doc/${pname}"
 		cp System.map "${pdir}/usr/lib/uml/modules/${KERNELRELEASE}/System.map"
 		cp ${KCONFIG_CONFIG} "${pdir}/usr/share/doc/${pname}/config"