wifi: brcmfmac: wcc: Add debug messages

The message is attach and detach function are merly for debugging,
change them from pr_err to pr_debug.
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230509100420.26094-1-matthias.bgg@kernel.org

drivers/net/wireless/broadcom/brcm80211/brcmfmac/wcc/core.c

@@ -12,13 +12,13 @@
 
 static int brcmf_wcc_attach(struct brcmf_pub *drvr)
 {
-	pr_err("%s: executing\n", __func__);
+	pr_debug("%s: executing\n", __func__);
 	return 0;
 }
 
 static void brcmf_wcc_detach(struct brcmf_pub *drvr)
 {
-	pr_err("%s: executing\n", __func__);
+	pr_debug("%s: executing\n", __func__);
 }
 
 const struct brcmf_fwvid_ops brcmf_wcc_ops = {