stmmac: fix the parsing of the eee_timer parameter

This pacth fixes the parsing of the eee_timer driver parameter.
Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -2254,7 +2254,7 @@ static int __init stmmac_cmdline_opt(char *str)
 		} else if (!strncmp(opt, "pause:", 6)) {
 			if (kstrtoint(opt + 6, 0, &pause))
 				goto err;
-		} else if (!strncmp(opt, "eee_timer:", 6)) {
+		} else if (!strncmp(opt, "eee_timer:", 10)) {
 			if (kstrtoint(opt + 10, 0, &eee_timer))
 				goto err;
 		}