usb: host: tegra: code clean up

With this patch:
1. Renamed structure and function names to be more meaningful.
2. Removed unnecessary local variables.

Change-Id: I0684d840c1b8c606c1643e1e2517e083be825787
Signed-off-by: Venu Byravarasu <vbyravarasu@nvidia.com>
Reviewed-on: http://git-master/r/92817
Reviewed-by: Simone Willett <swillett@nvidia.com>
Tested-by: Simone Willett <swillett@nvidia.com>
USB: ehci: tegra: fix USB1 port reset issue

Tegra USB1 port needs to issue Port Reset twice internally, otherwise it
fails to enumerate devices attached to it

Signed-off-by: Jim Lin <jilin@nvidia.com>
Signed-off-by: Olof Johansson <olofj@chromium.org>
[ squash two patches into one and minor style cleanups ]
Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
default test config with webtop
disabling part of 'USB: ehci: tegra: fix USB1 port reset issue' commit to get cpcap otg