[media] drxk: remove ops.info.frequency_stepsize from DVB-C

ops.info.frequency_stepsize is used only for DVB-T & friends. For
DVB-C, the step size is calculated using the symbol rate.

Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/dvb/frontends/drxk_hard.c

···
 	.delsys = { SYS_DVBC_ANNEX_A, SYS_DVBC_ANNEX_C },
 	.info = {
 		 .name = "DRXK DVB-C",
-		 .frequency_stepsize = 62500,
 		 .frequency_min = 47000000,
 		 .frequency_max = 862000000,
 		 .symbol_rate_min = 870000,