arm: tegra: no need to reserve fbmem

arm: tegra: no need to reserve fbmem

Bug 1602113

Now framebuffer memory is allocated by the driver, there is no
need to reserve by tegra_reserve4().

Change-Id: I4e2e025f17c32d338d15269aed65058498a7cb30
Signed-off-by: Eric Miao <emiao@nvidia.com>
Reviewed-on: http://git-master/r/711712
Reviewed-by: Jon Mayo <jmayo@nvidia.com>
Reviewed-by: Li Li (SW-TEGRA) <lli5@nvidia.com>
Tested-by: Li Li (SW-TEGRA) <lli5@nvidia.com>
Reviewed-by: Mitch Luban <mluban@nvidia.com>
Reviewed-on: http://git-master/r/805260
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Naveen Kumar S <nkumars@nvidia.com>
Tested-by: Naveen Kumar S <nkumars@nvidia.com>
Reviewed-by: Bibek Basu <bbasu@nvidia.com>