[PATCH] constify vga16fb.c

- move some static data into the .rodata section

- simplify source code for transl_l[] and transl_h[] which makes it more
  readable

Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>