This patch fixes a few bugs with the low level logo code.

  1. Allow DEC Alpha machines to draw the DEC logo
  2. Cleanup the logo directory on a make clean
  3. Some makefile cleanups.

  I have tested on my local machines. I like to be able to create the C
  files from the logos for only the ones we want to compile but I haven't
  figured out how to do that. That can wait. Please apply.
Signed-off-by: James Simmons <jsimmons@www.infradead.org>
Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>