V4L/DVB (8655): cxusb: fix checkpatch warnings & errors

V4L/DVB (8655): cxusb: fix checkpatch warnings & errors

Fix the following checkpatch.pl errors and warnings:

ERROR: do not use assignment in if condition
117: FILE: linux/drivers/media/dvb/dvb-usb/cxusb.c:819:
+	if ((adap->fe = dvb_attach(dib7000p_attach,

ERROR: switch and case should be at the same indent
155: FILE: linux/drivers/media/dvb/dvb-usb/cxusb.c:857:
+	switch (band) {
+		case BAND_VHF: offset = 950; break;
+		case BAND_UHF:
+		default: offset = 550; break;

WARNING: line over 80 characters
169: FILE: linux/drivers/media/dvb/dvb-usb/cxusb.c:871:
+	struct i2c_adapter *tun_i2c = dib7000p_get_i2c_master(adap->fe, DIBX000_I2C_INTERFACE_TUNER, 1);

WARNING: line over 80 characters
213: FILE: linux/drivers/media/dvb/dvb-usb/cxusb.c:1342:
+static struct dvb_usb_device_properties cxusb_bluebird_dualdig4_rev2_properties = {

WARNING: line over 80 characters
226: FILE: linux/drivers/media/dvb/dvb-usb/cxusb.c:1355:
+			.size_of_priv     = sizeof(struct dib0700_adapter_state),

total: 2 errors, 3 warnings, 266 lines checked

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
Cc: Anton Blanchard <anton@samba.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>