tg3: rename rx_[std|jmb]_ptr

A later patch is going to add consumer indicies for the producer rings.
To keep things readable, this patch renames rx_[std|jmb]_ptr to
rx_[std|jmb]_prod_idx.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 42fefa1..e0b86ba 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -2570,8 +2570,8 @@
 };
 
 struct tg3_rx_prodring_set {
-	u32				rx_std_ptr;
-	u32				rx_jmb_ptr;
+	u32				rx_std_prod_idx;
+	u32				rx_jmb_prod_idx;
 	struct tg3_rx_buffer_desc	*rx_std;
 	struct tg3_ext_rx_buffer_desc	*rx_jmb;
 	struct ring_info		*rx_std_buffers;