MdeModulePkg XhciDxe: Extract new XhciInsertAsyncIntTransfer function

V3:
Match function parameter name and description between
XhciSched.c and XhciSched.h.

V2:
Add the missing "FreePool (Data);".
Remove the unnecessary indentation change.

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1274

Extract new XhciInsertAsyncIntTransfer function from
XhcAsyncInterruptTransfer.

It is code preparation for following patch,
no essential functional change.

Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Cc: Hao Wu <hao.a.wu@intel.com>
Cc: Jian J Wang <jian.j.wang@intel.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Hao Wu <hao.a.wu@intel.com>

MdeModulePkg/Bus/Pci/XhciDxe/XhciSched.h

@@ -852,6 +852,34 @@ XhciDelAllAsyncIntTransfers (
   IN USB_XHCI_INSTANCE    *Xhc
   );
 
+/**
+  Insert a single asynchronous interrupt transfer for
+  the device and endpoint.
+
+  @param Xhc            The XHCI Instance
+  @param BusAddr        The logical device address assigned by UsbBus driver
+  @param EpAddr         Endpoint addrress
+  @param DevSpeed       The device speed
+  @param MaxPacket      The max packet length of the endpoint
+  @param DataLen        The length of data buffer
+  @param Callback       The function to call when data is transferred
+  @param Context        The context to the callback
+
+  @return Created URB or NULL
+
+**/
+URB *
+XhciInsertAsyncIntTransfer (
+  IN USB_XHCI_INSTANCE                  *Xhc,
+  IN UINT8                              BusAddr,
+  IN UINT8                              EpAddr,
+  IN UINT8                              DevSpeed,
+  IN UINTN                              MaxPacket,
+  IN UINTN                              DataLen,
+  IN EFI_ASYNC_USB_TRANSFER_CALLBACK    Callback,
+  IN VOID                               *Context
+  );
+
 /**
   Set Bios Ownership