netxen: fix firmware download warnings

Fix following warnings, by using integer firmware types.

drivers/net/netxen/netxen_nic_hw.c: In function 'netxen_load_firmware':
drivers/net/netxen/netxen_nic_hw.c:1146: warning: comparison with string literal results in unspecified behavior
drivers/net/netxen/netxen_nic_hw.c:1146: warning: comparison with string literal results in unspecified behavior
drivers/net/netxen/netxen_nic_hw.c:1146: warning: comparison with string literal results in unspecified behavior
drivers/net/netxen/netxen_nic_hw.c:1159: warning: comparison with string literal results in unspecified behavior
drivers/net/netxen/netxen_nic_hw.c:1159: warning: comparison with string literal results in unspecified behavior
drivers/net/netxen/netxen_nic_hw.c:1159: warning: comparison with string literal results in unspecified behavior

Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Dhananjay Phadke <dhananjay@netxen.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/netxen/netxen_nic.h b/drivers/net/netxen/netxen_nic.h
index 2544129..78e6228 100644
--- a/drivers/net/netxen/netxen_nic.h
+++ b/drivers/net/netxen/netxen_nic.h
@@ -693,9 +693,9 @@
 #define NX_BIOS_VERSION_OFFSET	(NETXEN_USER_START+0x83c)
 #define NX_FW_MAGIC_OFFSET	(NETXEN_BRDCFG_START+0x128)
 #define NX_FW_MIN_SIZE		(0x3fffff)
-#define NX_P2_MN_ROMIMAGE	"nxromimg.bin"
-#define NX_P3_CT_ROMIMAGE	"nx3fwct.bin"
-#define NX_P3_MN_ROMIMAGE	"nx3fwmn.bin"
+#define NX_P2_MN_ROMIMAGE	0
+#define NX_P3_CT_ROMIMAGE	1
+#define NX_P3_MN_ROMIMAGE	2
 
 #define NETXEN_USER_START_OLD NETXEN_PXE_START	/* for backward compatibility */