stmmac: fix 'lenght' typo in comments and code

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/stmmac/common.h

@@ -44,7 +44,7 @@ struct stmmac_extra_stats {
 	unsigned long rx_toolong;
 	unsigned long rx_collision;
 	unsigned long rx_crc;
-	unsigned long rx_lenght;
+	unsigned long rx_length;
 	unsigned long rx_mii;
 	unsigned long rx_multicast;
 	unsigned long rx_gmac_overflow;

drivers/net/stmmac/dwmac100.c

@@ -265,7 +265,7 @@ static int dwmac100_get_rx_frame_status(void *data,
 		ret = discard_frame;
 
 	if (unlikely(p->des01.rx.length_error)) {
-		x->rx_lenght++;
+		x->rx_length++;
 		ret = discard_frame;
 	}
 	if (unlikely(p->des01.rx.mii_error)) {

drivers/net/stmmac/dwmac1000_dma.c

@@ -230,7 +230,7 @@ static int dwmac1000_coe_rdes0(int ipc_err, int type, int payload_err)
 
 	/* bits 5 7 0 | Frame status
 	 * ----------------------------------------------------------
-	 *      0 0 0 | IEEE 802.3 Type frame (lenght < 1536 octects)
+	 *      0 0 0 | IEEE 802.3 Type frame (length < 1536 octects)
 	 *      1 0 0 | IPv4/6 No CSUM errorS.
 	 *      1 0 1 | IPv4/6 CSUM PAYLOAD error
 	 *      1 1 0 | IPv4/6 CSUM IP HR error
@@ -331,7 +331,7 @@ static int dwmac1000_get_rx_frame_status(void *data,
 	}
 	if (unlikely(p->des01.erx.length_error)) {
 		DBG(KERN_ERR "GMAC RX: length_error error\n");
-		x->rx_lenght++;
+		x->rx_length++;
 		ret = discard_frame;
 	}
 #ifdef STMMAC_VLAN_TAG_USED

drivers/net/stmmac/stmmac_ethtool.c

@@ -62,7 +62,7 @@ static const struct  stmmac_stats stmmac_gstrings_stats[] = {
 	STMMAC_STAT(rx_toolong),
 	STMMAC_STAT(rx_collision),
 	STMMAC_STAT(rx_crc),
-	STMMAC_STAT(rx_lenght),
+	STMMAC_STAT(rx_length),
 	STMMAC_STAT(rx_mii),
 	STMMAC_STAT(rx_multicast),
 	STMMAC_STAT(rx_gmac_overflow),