Add in SunOS 4.1.x compatible mode for UFS

Add in support for SunOS 4.1.x flavor of BSD 4.2 UFS filing system Macros have
been put in to alow suport for the old static table Cylinder Groups but this
implementation does not use them yet.

This also fixes Solaris UFS filing system access by disabling fast symbolic
links as Sun's version of UFS does not support on-disk fast symbolic links.

Tested by:
  Ppartitioning a new disk using SunOS 4.1.1, creating a UFS filing system on
  one of the partitions and writing some files to the filing system.
  Using Linux-2.6.22 (patched) to read the files and then write a shed load of
  files to the UFS partition.
  Using SunOS 4.1.1 to verify the filing system is OK and to check the files.
The test host is a sun4c SS1 Clone.

[[email protected]: coding style fixes]
[[email protected]: fix oops]
Signed-off-by: Mark Fortescue <[email protected]>
Cc: Evgeniy Dushistov <[email protected]>
Signed-off-by: Alexey Dobriyan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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