oml: fix ARFCN range check in oml_rx_set_radio_attr()
oml: fix ARFCN range check in oml_rx_set_radio_attr()

Change-Id: I11c8203dfe26175632974e5c6859eeaea962e878

osmocom/osmo-bts,osmocom/osmo-bts,osmocom/osmo-bts