chore(gfx): Clarify creation of powervr.ini for SGX debug

Clarify across the file that the powervr.ini file is not necessarily in the
fs. If not, it should be created.  Provide examples of warnings where
applicable.

Signed-off-by: Antonios Christidis <[email protected]>

Author: Antonios-C

source/linux/Foundational_Components/Graphics/SGX/SGX_Debug_Info.rst

@@ -47,6 +47,14 @@ Create the following script to show the current SGX driver environment on the ta
    echo "Linux Kernel version"
    uname -a
 
+If you are not using any app hints, or have not created the :file:`powervr.ini` file then you should see the following:
+
+.. code-block:: text
+
+   WSEGL settings
+   cat: /etc/powervr.ini: No such file or directory
+
+
 **************************************************
 Runtime checks and configuration of the SGX driver
 **************************************************
@@ -62,7 +70,7 @@ checking the following:
 
 The SGX driver supports some runtime configuration on the target by using a
 configuration file. The optional configuration file is present in the Processor
-SDK at :file:`/etc/powervr.ini`.
+SDK at :file:`/etc/powervr.ini`. If no file is present, you need to create it.
 
 Configuration items use the following syntax: