NvmExpressMediaClear: Fix BufferSize value in writeblocks call.

NvmExpressMediaClear requires that the overwrite buffer be
the same size as the block size of the media but then
WriteBlocks expects BufferSize in bytes. NvmExpressMediaClear was
hardcoded to call using 1.  This causes the WriteBlocks to fail.

Author: spbrogan

MdeModulePkg/Bus/Pci/NvmExpressDxe/NvmExpressMediaSanitize.c

@@ -352,14 +352,18 @@ NvmExpressMediaClear (
   }
 
   //
-  // If an invalid buffer or buffer size is sent, the Media Clear operation
-  // cannot be performed as it requires a native WRITE command. The overwrite
-  // buffer must have granularity of a namespace block size.
+  // If an invalid buffer is sent, the Media Clear operation
+  // cannot be performed as it requires a native WRITE command.
   //
   if (SectorOwBuffer == NULL) {
     return EFI_INVALID_PARAMETER;
   }
 
+  //
+  // Since the parameters do not include OwBuffer Size, the size of the overwrite buffer is assumed to be equal
+  // to the block size of the media.
+  //
+
   Status = EFI_SUCCESS;
 
   //
@@ -370,9 +374,9 @@ NvmExpressMediaClear (
       Status = Device->BlockIo.WriteBlocks (
                                  &Device->BlockIo,
                                  MediaId,
-                                 SectorOffset,  // Sector/LBA offset (increment each pass)
-                                 1,             // Write one sector per write
-                                 SectorOwBuffer // overwrite buffer
+                                 SectorOffset,                   // Sector/LBA offset (increment each pass)
+                                 (UINTN)Device->Media.BlockSize, // Write one block/sector at a time with overwrite buffer
+                                 SectorOwBuffer                  // overwrite buffer
                                  );
     }