media: tegra_camera: remove duplicated code

media: tegra_camera: remove duplicated code

CSI_A and CSI_B is normally identical. This patch provides generic
functions to setup CSI_A and CSI_B registers and remove those
duplicated code.

It's important to bring up T210 VI/CSI driver.

Bug 1572170
Bug 1572171

Change-Id: If2167f543c62a3e833d23e1d7246668aa4ae2986
Signed-off-by: Bryan Wu <pengw@nvidia.com>
Reviewed-on: http://git-master/r/663541
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: David Wang (SW-TEGRA) <davidw@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Jihoon Bang <jbang@nvidia.com>
Reviewed-by: Venkat Moganty <vmoganty@nvidia.com>