[PATCH] tgafb: switch to framebuffer_alloc()

This is a set of changes to update the driver to the framebuffer_alloc() API.
Included, there is also a fix to a memory leak due to the colour map
allocation not being freed upon driver's removal.  Aside from the fix there
are no functional changes.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: James Simmons <jsimmons@infradead.org>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>