ALSA: hdsp: remove redundant assignment to variable err

Variable err is being assigned with a value that is never read, it is
assigned a new value in the next statement. The assignment is redundant
and can be removed.

Addresses-Coverity: ("Unused value")
Signed-off-by: NColin Ian King <colin.king@canonical.com>
Link: https://lore.kernel.org/r/20200208222006.37376-1-colin.king@canonical.comSigned-off-by: NTakashi Iwai <tiwai@suse.de>

sound/pci/rme9652/hdsp.c

@@ -3353,7 +3353,8 @@ snd_hdsp_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 				return;
 			}
 		} else {
-			int err = -EINVAL;
+			int err;
+
 			err = hdsp_request_fw_loader(hdsp);
 			if (err < 0) {
 				snd_iprintf(buffer,