base-files: reduce `sed` calls

The `sed`-script shouldn't be called multiple times, especially not with
the same files.

This commit merges all files together in a single `sed`-script call.

Signed-off-by: Paul Spooren <mail@aparcar.org>

package/base-files/Makefile

@@ -150,13 +150,11 @@ define Package/base-files/install
 
 	$(VERSION_SED_SCRIPT) \
 		$(1)/etc/banner \
+		$(1)/etc/device_info \
+		$(1)/etc/openwrt_release \
 		$(1)/etc/openwrt_version \
 		$(1)/usr/lib/os-release
 
-	$(VERSION_SED_SCRIPT) \
-		$(1)/etc/openwrt_release \
-		$(1)/etc/device_info \
-		$(1)/usr/lib/os-release
 
 	$(SED) "s#%PATH%#$(TARGET_INIT_PATH)#g" \
 		$(1)/sbin/hotplug-call \