docs(power_management): AM62Lx: Update LPM feature support information

Add note to convey that LPM support is not present in the current
release.
Delete the release specific file for LPM. Remove LPM from list of
new features in the current release.

Signed-off-by: Akashdeep Kaur <a-kaur@ti.com>

Author: akashdeep-ti

source/devices/AM62LX/linux/Release_Specific_Release_Notes.rst

@@ -53,7 +53,6 @@ What's new
   - U-Boot: :ref:`Key writer lite Programming <key-writer-lite-label>`
   - Kernel: DMA, GPIO, I2C, UART, MMCSD, OSPI NOR, eCAP, eQEP, CPSW, McASP/Audio, DSS, DSI
   - Kernel: :ref:`DTHEv2 Crypto Accelerator <DTHEv2-Crypto-Accelerator>`
-  - :ref:`Power Management <am62lx-power-management>`: DeepSleep and RTC+DDR low power modes.
   - RT Kernel : Real-Time Linux Interrupt Latency numbers here - :ref:`RT Interrupt Latencies <RT-linux-performance>`
   - Support for Wifi with M2 CC33xx cards - :ref:`How to Enable M.2-CC33xx in Linux <enable_m2cc3301>`
   - Out-of-Box experience based on LVGL (Light and Versatile Graphics Library) - :ref:`TI LVGL Demo - User Guide <TI-LVGL-Demo-User-Guide-label>`

source/devices/AM62LX/linux/Release_Specific_Workarounds.rst

@@ -7,11 +7,9 @@ Low Power Modes
 Overview
 ********
 
-.. note::
+.. important::
 
-   For this release, both of the documented low power modes below require special steps which have been
-   documented in :ref:`am62l_suspend_workarounds`. This includes the steps to choose the system suspend mode
-   and how to wakeup the system.
+   For this release, low power mode support is disabled. It will be enabled in 11.1 release.
 
 The following sections describe a high-level description of the different low power modes (LPM) of the
 device. If your application requires inactive power management, you must determine which