boards: amlogic: update documentation for WeTek Core2

Update the device matrix and add build instructions.

Signed-off-by: Christian Hewitt <christianshewitt@gmail.com>
[narmstrong: added wetek-core2.rst to q200 MAINTAINERS and added blank lines to fix build]
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/doc/board/amlogic/index.rst b/doc/board/amlogic/index.rst
index cba1c7b..a585d85 100644
--- a/doc/board/amlogic/index.rst
+++ b/doc/board/amlogic/index.rst
@@ -17,7 +17,7 @@
 +===============================+===========+=================+==============+============+============+=============+==============+
 | Boards                       	| Odroid-C2 | P212            | Khadas VIM2  | S400       | U200       | Odroid-N2   | SEI610       |
 |        			| Nanopi-K2 | Khadas-VIM      | Libretech-PC |	          | SEI510     | Khadas-VIM3 | Khadas-VIM3L |
-|        			| P200	    | LibreTech-CC v1 |	             |	          |            |	     | Odroid-C4    |
+|        			| P200	    | LibreTech-CC v1 |	WeTek Core2  |	          |            |	     | Odroid-C4    |
 |        			| P201	    | LibreTech-AC v2 |	             |	          |            |             |              |
 +-------------------------------+-----------+-----------------+--------------+------------+------------+-------------+--------------+
 | UART                       	| **Yes**   | **Yes**         | **Yes**      | **Yes**    | **Yes**    | **Yes**     | **Yes**      |
@@ -95,4 +95,5 @@
    sei510
    sei610
    u200
+   wetek-core2
    w400