MdeModulePkg/UfsPciHc: Avoid overriding return value in BindingStart
    
    In function UfsHcDriverBindingStart(), the return value 'Status' may be
    overridden during the original PCI attributes restore process.
    
    This commit refines the logic to avoid such override.
    
    Contributed-under: TianoCore Contribution Agreement 1.0
    Signed-off-by: Hao Wu <hao.a.wu@intel.com>
    Reviewed-by: Star Zeng <star.zeng@intel.com>