MdeModulePkg/PciBusDxe: Add feedback status for PciIoMap

PciIoMap () need to feedback the status of
mIoMmuProtocol->SetAttribute () return value.

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4652

Reviewed-by: Ray Ni <ray.ni@intel.com>
Reviewed-by: Huang Jenny <jenny.huang@intel.com>
Cc: Chiang Chris <chris.chiang@intel.com>
Signed-off-by: Sheng Wei <w.sheng@intel.com>

MdeModulePkg/Bus/Pci/PciBusDxe/PciIo.c

@@ -1024,12 +1024,12 @@ PciIoMap (
           return EFI_INVALID_PARAMETER;
       }
 
-      mIoMmuProtocol->SetAttribute (
-                        mIoMmuProtocol,
-                        PciIoDevice->Handle,
-                        *Mapping,
-                        IoMmuAttribute
-                        );
+      Status = mIoMmuProtocol->SetAttribute (
+                                 mIoMmuProtocol,
+                                 PciIoDevice->Handle,
+                                 *Mapping,
+                                 IoMmuAttribute
+                                 );
     }
   }