USB: phy: disable PD_TX after delay

USB: phy: disable PD_TX after delay

Delay after disabling PD_TX could cause a glitch on the USB bus

Bug 1600315

Change-Id: I89e9eec228201ecca27dd750eaf8116704dd4315
Signed-off-by: Suresh Mangipudi <smangipudi@nvidia.com>
Reviewed-on: http://git-master/r/734251
(cherry picked from commit 9e1005b01be24f09a7ee66e3c9e5dacfa139c03a)
Reviewed-on: http://git-master/r/759511
Reviewed-by: Venkat Moganty <vmoganty@nvidia.com>
Tested-by: Venkat Moganty <vmoganty@nvidia.com>
Reviewed-on: http://git-master/r/1159452
Reviewed-by: Rohith Seelaboyina <rseelaboyina@nvidia.com>
Tested-by: Rohith Seelaboyina <rseelaboyina@nvidia.com>
Reviewed-by: Rakesh Babu Bodla <rbodla@nvidia.com>
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>