[SETUPLIB] Consolidate the FsUtil and PartList modules of the SetupLib.

- Add a PreparePartitionForFormatting routine that sets the partition ID depending on the chosen filesystem.
- The 'FORMATMACHINESTATE FormatState' machine-state and the 'TempPartition' members of the partition list structure is purely a USETUP convenience, so remove them from the PARTLIST structure and move them back into USETUP.
- Attempt to recognize the filesystem (set the 'FileSystem' member of PARTENTRY) of partitions we are adding into the PARTLIST list.
- Fix the return value of the SelectPartition function, which is by the way completely broken (it doesn't do what it is supposed to do; alternatively its naming is completely wrong...).

svn path=/branches/setup_improvements/; revision=74572
svn path=/branches/setup_improvements/; revision=74573

base/setup/lib/fsutil.h

@@ -31,4 +31,10 @@ GetFileSystem(
     // IN PFILE_SYSTEM_LIST FileSystemList,
     IN struct _PARTENTRY* PartEntry);
 
+
+BOOLEAN
+PreparePartitionForFormatting(
+    IN struct _PARTENTRY* PartEntry,
+    IN PFILE_SYSTEM FileSystem);
+
 /* EOF */