[PATCH] fbdev: pm2fb: Driver cleanups

- remove unneeded casts
- move memory for pseudo_palette inside struct pm2fb_par

Signed-off-by: Antonino Daplas <adaplas@pol.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>