ARM: tegra: e1853: Add e1853 defconfig

Add a defconfig file for E1853 board

Bug 966833
Bug 1018258

Signed-off-by: Ashwin Joshi <asjoshi@nvidia.com>

Change-Id: I7cbde666acbe13fcaca2f56d877e0b4872756c17
Reviewed-on: http://git-master/r/118281
Reviewed-by: Automatic_Commit_Validation_User
Tested-by: Ashwin Joshi <asjoshi@nvidia.com>
Reviewed-by: Bhavesh Parekh <bparekh@nvidia.com>
Reviewed-by: Sandeep Trasi <strasi@nvidia.com>
(cherry picked from commit 465ba7c85429964a7937a6683376d72e396ebe47)
Reviewed-on: http://git-master/r/119650
Reviewed-by: Simone Willett <swillett@nvidia.com>
Tested-by: Simone Willett <swillett@nvidia.com>