DEVELOPERS: add myself for package/atftp

Signed-off-by: Brandon Maier <brandon.maier@collins.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

DEVELOPERS

@@ -542,6 +542,7 @@ F:	package/ncdu/
 N:	Brandon Maier <brandon.maier@collins.com>
 F:	board/freescale/ls1046a-frwy/
 F:	configs/ls1046a-frwy_defconfig
+F:	package/atftp/
 F:	package/bats-assert/
 F:	package/bats-file/
 F:	package/bats-support/