boards: seagate: adopt new zephyr:board directive and role

This updates the documentation of all the Seagate boards to use
the new `zephyr:board::` directive.

Signed-off-by: Benjamin Cabé <[email protected]>

Author: kartben

boards/seagate/faze/doc/index.rst

@@ -1,7 +1,4 @@
-.. _faze:
-
-Seagate FireCuda Gaming SSD (FaZe) board
-########################################
+.. zephyr:board:: faze
 
 Overview
 ********
@@ -14,10 +11,6 @@ through I2C and GPIOs.
 
 This Zephyr port is running on the NXP LPC11U67 MCU.
 
-.. image:: firecuda-gaming-ssd.jpg
-   :align: center
-   :alt: Seagate FireCuda Gaming SSD
-
 Hardware
 ********
 

boards/seagate/legend/doc/index.rst

@@ -1,7 +1,4 @@
-.. _legend:
-
-Legend
-######
+.. zephyr:board:: legend
 
 Overview
 ********