sfc: Comment corrections

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/sfc/falcon_boards.c b/drivers/net/sfc/falcon_boards.c
index 333ccc1..f05c9d3 100644
--- a/drivers/net/sfc/falcon_boards.c
+++ b/drivers/net/sfc/falcon_boards.c
@@ -144,7 +144,7 @@
  */
 
 /**************************************************************************
- * Support for I2C IO Expander device on SFE40001
+ * Support for I2C IO Expander device on SFE4001
  */
 #define	PCA9539 0x74