gadgetd: scrap return value of parse_cmdline function
gadgetd: scrap return value of parse_cmdline function

parse_cmdline function always returns zero.  Indeed the caller never
uses its return value.  Just drop it.

Signed-off-by: Michal Nazarewicz <605208d9b4c769ca62e9f9f8b592c9cd465fe6d7@mina86.com>
Acked-by: Krzysztof Opasiak <8064eda6f94b3817252b7d7649cf754592f63500@samsung.com>

gadgetd/gadgetd,gadgetd/gadgetd,gadgetd/gadgetd