staging: wilc1000: replace numerical constant with predefined MACRO

Replace the pre-defined macro signifying the ethernet protocol type
defined in the kernel headers instead of the numerical constant

Signed-off-by: Hari Prasath Gujulan Elango <hgujulan@visteon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/staging/wilc1000/wilc_wlan.c b/drivers/staging/wilc1000/wilc_wlan.c
index 83af51b..0b62cc5 100644
--- a/drivers/staging/wilc1000/wilc_wlan.c
+++ b/drivers/staging/wilc1000/wilc_wlan.c
@@ -248,7 +248,7 @@
 
 	eth_hdr_ptr = &buffer[0];
 	h_proto = ntohs(*((unsigned short *)&eth_hdr_ptr[12]));
-	if (h_proto == 0x0800) {
+	if (h_proto == ETH_P_IP) {
 		u8 *ip_hdr_ptr;
 		u8 protocol;