boards: ti: lp_em_cc2340r5: Fix documentation

This ensures board shows up nicely in docs and search.

Signed-off-by: Julien Panis <[email protected]>

Author: jpanisbl

boards/ti/lp_em_cc2340r5/board.yml

@@ -1,5 +1,6 @@
 board:
   name: lp_em_cc2340r5
+  full_name: CC2340R5 LaunchPad
   vendor: ti
   socs:
     - name: cc2340r5

boards/ti/lp_em_cc2340r5/doc/index.rst

@@ -1,7 +1,4 @@
-.. _lp_em_cc2340r5:
-
-TI CC2340R5 Launchpad
-#####################
+.. zephyr:board:: lp_em_cc2340r5
 
 Overview
 ********
@@ -11,12 +8,6 @@ development kit for the SimpleLink |trade| multi-Standard CC2340R5 wireless MCU.
 
 See the `TI CC2340R5 LaunchPad Product Page`_ for details.
 
-.. figure:: img/lp_em_cc2340r5.webp
-   :align: center
-   :alt: TI CC2340R5 Launchpad
-
-   Texas Instruments CC2340R5 LaunchPad |trade|
-
 Hardware
 ********