[rtems commit] dec_21140.rst, network_task_structure.rst: Change image to figure

[Joel Sherrill]

Module:    rtems
Branch:    master
Commit:    53d00e6a43b2934363dcf4d969909ea20b3da311
Changeset: http://git.rtems.org/rtems/commit/?id=53d00e6a43b2934363dcf4d969909ea20b3da311

Author:    Joel Sherrill <joel at rtems.org>
Date:      Fri Oct 28 12:21:15 2016 -0500

dec_21140.rst, network_task_structure.rst: Change image to figure

---

 networking/dec_21140.rst              | 10 ++++++----
 networking/network_task_structure.rst |  5 +++--
 2 files changed, 9 insertions(+), 6 deletions(-)

diff --git a/networking/dec_21140.rst b/networking/dec_21140.rst
index 0d5a1c8..99ca00f 100644
--- a/networking/dec_21140.rst
+++ b/networking/dec_21140.rst
@@ -61,8 +61,9 @@ PowerPC target.
 .. COMMENT: PCI Device's Configuration Header Space Format
 
 
-.. image:: ../images/networking/PCIreg.jpg
-
+.. figure ../images/networking/PCIreg.jpg
+  :align: center
+  :alt: PCI Device's Configuration Header Space Format
 
 .. COMMENT: XXX add crossreference to PCI Register Figure
 
@@ -125,8 +126,9 @@ to the DEC21140 Hardware Manual.
 .. COMMENT: Buffer Descriptor
 
 
-.. image:: ../images/networking/recvbd.jpg
-
+.. figure:: ../images/networking/recvbd.jpg
+  :align: center
+  :alt: Buffer Descriptor
 
 Receiver Thread
 ---------------
diff --git a/networking/network_task_structure.rst b/networking/network_task_structure.rst
index 1dae210..51bccd5 100644
--- a/networking/network_task_structure.rst
+++ b/networking/network_task_structure.rst
@@ -11,8 +11,9 @@ Network Task Structure and Data Flow
 A schematic diagram of the tasks and message *mbuf* queues in a simple RTEMS
 networking application is shown in the following figure:
 
-.. image:: ../images/networking/networkflow.jpg
-
+.. figure:: ../images/networking/networkflow.jpg
+  :align: center
+  :alt: Network Flow
 
 The transmit task for each network interface is normally blocked waiting for a
 packet to arrive in the transmit queue.  Once a packet arrives, the transmit