stmmac: Add missing LF to pr_info() in stmmac_main.c

Otherwise the output looks like this:

...
STMMAC - user ID: 0x10, Synopsys ID: 0x32
 No HW DMA feature register supported
 Normal descriptors
 Remote wake-up capable
 Checksum Offload Engine supported
 No MAC Management Counters availableIP-Config: Complete:
     device=eth0, addr=192.168.20.42, mask=255.255.0.0, gw=192.168.1.254,
...
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Acked-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/stmicro/stmmac/stmmac_main.c

@@ -772,7 +772,7 @@ static void stmmac_mmc_setup(struct stmmac_priv *priv)
 		dwmac_mmc_ctrl(priv->ioaddr, mode);
 		memset(&priv->mmc, 0, sizeof(struct stmmac_counters));
 	} else
-		pr_info(" No MAC Management Counters available");
+		pr_info(" No MAC Management Counters available\n");
 }
 
 static u32 stmmac_get_synopsys_id(struct stmmac_priv *priv)