fix(webserver): add multi-device OOB webserver demo guide

Rewrite the Webserver_Demo_User_Guide.rst to extend support
to AM335x, AM62x, AM62Px, and AM62Lx devices.

Signed-off-by: Telukula Jeevan Kumar Sahu <j-sahu@ti.com>

Author: jeevantelukula

configs/AM62LX/AM62LX_linux_toc.txt

@@ -141,6 +141,7 @@ common/How_to_Guides/AM62Lx_EVM_Hardware_Setup
 linux/Demo_User_Guides/index_Demos
 linux/Demo_User_Guides/TI_LVGL_Demo_User_Guide
 linux/Demo_User_Guides/EV_charging_Demo_User_Guide
+linux/Demo_User_Guides/Webserver_Demo_User_Guide
 
 boards/index
 boards/beagle/BeagleBadge/BeagleBadge

configs/AM62PX/AM62PX_linux_toc.txt

@@ -188,5 +188,6 @@ linux/Demo_User_Guides/Seva_Store
 linux/Demo_User_Guides/Display_Cluster_User_Guide
 linux/Demo_User_Guides/Chromium_Browser
 linux/Demo_User_Guides/GUI_Frameworks_User_Guide
+linux/Demo_User_Guides/Webserver_Demo_User_Guide
 
 linux/Documentation_Tarball

configs/AM62X/AM62X_linux_toc.txt

@@ -191,6 +191,7 @@ linux/Demo_User_Guides/TI_Apps_Launcher_User_Guide
 linux/Demo_User_Guides/Seva_Store
 linux/Demo_User_Guides/Chromium_Browser
 linux/Demo_User_Guides/GUI_Frameworks_User_Guide
+linux/Demo_User_Guides/Webserver_Demo_User_Guide
 
 common/PRU-ICSS/Getting_Started_with_PSSP
 common/PRU-ICSS/Header_Files