pcie: host: tegra: increase pcie linkup time

pcie: host: tegra: increase pcie linkup time

increases pcie link up time from its current 100ms
value to 350ms value because of the specific USB3.0 controller
card based on VIA chipset takes around 350ms time to linkup
with rootport. To be at par with x86 machine interms of
device enumeration, this change is required.
Also, this changes comes into picture only if there is a device
found (i.e. only if TX_RDET_STATUS is already set)

Bug 200171635

Change-Id: I1ccdd395467eb78fed59319f1ab9199210d7bd62
Signed-off-by: Vidya Sagar <vidyas@nvidia.com>
Reviewed-on: http://git-master/r/1009897
Reviewed-by: Automatic_Commit_Validation_User
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>