drivers/net/ixgb: Add missing "space"

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>
diff --git a/drivers/net/ixgbe/ixgbe_common.c b/drivers/net/ixgbe/ixgbe_common.c
index 9c10c05..7fd6aeb 100644
--- a/drivers/net/ixgbe/ixgbe_common.c
+++ b/drivers/net/ixgbe/ixgbe_common.c
@@ -954,7 +954,7 @@
 	u32 rmcs_reg;
 
 	if (packetbuf_num < 0 || packetbuf_num > 7)
-		hw_dbg(hw, "Invalid packet buffer number [%d], expected range"
+		hw_dbg(hw, "Invalid packet buffer number [%d], expected range "
 		       "is 0-7\n", packetbuf_num);
 
 	frctl_reg = IXGBE_READ_REG(hw, IXGBE_FCTRL);