The definition of "comma" exists in scripts/Kbuild.include.
We should not double it.
Note:
This was already fixed in Linux Kernel too.
See commit 226422d08c33 of Linux Kernel.
Signed-off-by: Masahiro Yamada <yamada.m@jp.panasonic.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>