MdeModulePkg/XhciDxe: Separate common logic to XhcTransfer
MdeModulePkg/XhciDxe: Separate common logic to XhcTransfer

The patch separates the common logic in XhcControlTransfer,
XhcBulkTransfer and XhcSyncIntTransfer to a sub-routine
XhcTransfer. It doesn't have functionality impact.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ruiyu Ni <9fa3a6894a36bca79e6a72ad65af5a5702efecd1@intel.com>
Reviewed-by: Hao Wu <f387b71200577e27ccf5abb090fda0ddd187ec6e@intel.com>
Cc: Star Zeng <5c6bb72efe464613af94e84c05522a361b23844a@intel.com>
Cc: Feng Tian <e66bb7e9f36c82a029035c5885acf75500d07e68@intel.com>

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