video: tegra: dc: fix memory leaks in edid_fops

video: tegra: dc: fix memory leaks in edid_fops

single_open in dbg_edid_open allocates memory which is freed
only when release operation frees it. Else this can result in
memory leak.

Also, fix the memory leak within the dbg_edid_write operation.

Bug 1617527

Change-Id: Ia6d2582bff526b8e02223cd5760c304432917eb4
Signed-off-by: Sri Krishna chowdary <schowdary@nvidia.com>
Reviewed-on: http://git-master/r/713573
Reviewed-by: Krishna Reddy <vdumpa@nvidia.com>
Reviewed-by: Shridhar Rasal <srasal@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
Reviewed-by: Animesh Kishore <ankishore@nvidia.com>
Reviewed-by: Juha Tukkinen <jtukkinen@nvidia.com>