media: bt8xx: avoid a needless u8 to char conversion

Instead of doing the cast, just change the type to char.
Suggested-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/pci/bt8xx/dst.c

@@ -1100,8 +1100,8 @@ static int dst_get_device_id(struct dst_state *state)
 			/*	Card capabilities	*/
 			state->dst_hw_cap = p_dst_type->dst_feature;
 			pr_err("Recognise [%s]\n", p_dst_type->device_id);
-			strscpy((char *)state->fw_name, p_dst_type->device_id,
-				sizeof(state->fw_name));
+			strscpy(state->fw_name, p_dst_type->device_id,
+			        sizeof(state->fw_name));
 			/*	Multiple tuners		*/
 			if (p_dst_type->tuner_type & TUNER_TYPE_MULTI) {
 				switch (use_dst_type) {

drivers/media/pci/bt8xx/dst_common.h

@@ -138,7 +138,7 @@ struct dst_state {
 	u32 tuner_type;
 	char *tuner_name;
 	struct mutex dst_mutex;
-	u8 fw_name[8];
+	char fw_name[8];
 	struct dvb_device *dst_ca;
 };