busybox: disable long options in defconfig

busybox: disable long options in defconfig

These are activated by the longopts.cfg fragment, thus there should be
no need to set them in the defconfig.
The individual long options where enabled without mentioning a specific
need, mostly while adding the corresponding command, thus it should be
safe to disable them.

Note that we cannot disable the general 'LONG_OPTS' feature in the
defconfig since this is e.g. required by CONFIG_HWCLOCK (since v1.37).

Signed-off-by: Enrico Jörns <ejo@pengutronix.de>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>