[media] drxk: better handle errors
As reported by smatch:
drivers/media/dvb-frontends/drxk_hard.c:3277 dvbt_sc_command() warn: missing break? reassigning 'status'
This is basically because the error handling logic there was crappy.
Signed-off-by: NMauro Carvalho Chehab <mchehab@osg.samsung.com>
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