staging: dwc2: remove use of NO_FS_PHY_HW_CHECKS macro

NO_FS_PHY_HW_CHECKS is never defined, so remove the conditional
code that checks for it being set

Signed-off-by: Paul Zimmerman <paulz@synopsys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>