brcmfmac: do not convert linux error to firmware error string

In case of a linux error brcmf_fil_cmd_data() blurts an error message
in which the error code is translated to an error string. However, it
maps it to a firmware error string which should not happen. Simply
print only the numeric error code and be done with it.
Reviewed-by: Hante Meuleman <hante.meuleman@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieter-paul.giesberts@broadcom.com>
Reviewed-by: Franky Lin <franky.lin@broadcom.com>
Signed-off-by: Arend van Spriel <arend.vanspriel@broadcom.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil.c

@@ -124,8 +124,7 @@ brcmf_fil_cmd_data(struct brcmf_if *ifp, u32 cmd, void *data, u32 len, bool set)
 					     data, len, &fwerr);
 
 	if (err) {
-		brcmf_dbg(FIL, "Failed: %s (%d)\n",
-			  brcmf_fil_get_errstr((u32)(-err)), err);
+		brcmf_dbg(FIL, "Failed: error=%d\n", err);
 	} else if (fwerr < 0) {
 		brcmf_dbg(FIL, "Firmware error: %s (%d)\n",
 			  brcmf_fil_get_errstr((u32)(-fwerr)), fwerr);