usb: host: tegra:remove unnecessary phy api calls

usb: host: tegra:remove unnecessary phy api calls

Some of the variables are passed through platform data,
no need to call phy callbacks for initialization.

Bug 1242710

Change-Id: Ic16db9c1daefb19e2ffa8cc0bd6ac4ac48fdd569
Signed-off-by: Rakesh Bodla <rbodla@nvidia.com>
Reviewed-on: http://git-master/r/207634
(cherry picked from commit d578ccc61540ec39d7f090cd261172392e52436e)
Reviewed-on: http://git-master/r/209651
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Venkat Moganty <vmoganty@nvidia.com>