cxgb4: allocate more space for MSI-X interrupt names

Currently MSI-X names for netdevs with long names are truncated in
/proc/interrupts due to insufficient space.  Use IFNAMSIZ to size the
needed space.

Signed-off-by: Dimitris Michailidis <dm@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/cxgb4/cxgb4.h b/drivers/net/cxgb4/cxgb4.h
index 3d4253d3..f3d9f64 100644
--- a/drivers/net/cxgb4/cxgb4.h
+++ b/drivers/net/cxgb4/cxgb4.h
@@ -497,7 +497,7 @@
 
 	struct {
 		unsigned short vec;
-		char desc[14];
+		char desc[IFNAMSIZ + 10];
 	} msix_info[MAX_INGQ + 1];
 
 	struct sge sge;