fbdev/msm: sanitize debugfs inputs when reading mdp memory

Sanitize debugfs inputs to only allow access to mdp memory block
specified in dtsi file. This change will allow only one single block
to be read at the time and will avoid accessing memory outside of valid
decode space which can trigger AHB error bus response.

Change-Id: Icede9a8939a66faa59d674c18183fb0ebcf67908
Signed-off-by: Amine Najahi <anajahi@codeaurora.org>
1 file changed