MdeModulePkg NvmExpressDxe: Initialize IoAlign info for an NVMe device

MdeModulePkg NvmExpressDxe: Initialize IoAlign info for an NVMe device

The "IoAlign" field in EFI_BLOCK_IO_MEDIA of an NVMe device is not
initialized properly, leading to a zero value for this field.

It should be initialized from the "IoAlign" field in the
EFI_NVM_EXPRESS_PASS_THRU_MODE structure maintained by the NVMe
controller.

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>