Previously, the code uninstalls the DEVICE_PATH_PROTOCOL with the device path given by caller of the 'RamDiskUnregister' function. The given device path might be different from the one used to install the DEVICE_PATH_PROTOCOL. Contributed-under: TianoCore Contribution Agreement 1.0 Signed-off-by: Hao Wu <hao.a.wu@intel.com> Reviewed-by: Feng Tian <feng.tian@intel.com>