media: tegra: nvavp: Fix reloc offset check

media: tegra: nvavp: Fix reloc offset check

- Check whether command buffer data offset is 32-bit
  aligned
- Check whether relocation offset is 32-bit aligned
  and calculated offset is within command buffer size
- Check whether target offset is 32-bit aligned
  and derived address is within target buffer size

Bug 1741516

Change-Id: Ie5370bc1538c8cf9a702904fb88eb850baeb063d
Signed-off-by: Somu Sundaram <somasundaram@nvidia.com>
Reviewed-on: http://git-master/r/1113949
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Tested-by: Somu Sundaram <somasundarams@nvidia.com>
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>