staging/xgifb: Remove superfluous header includes

This patch removes all unnecessary, redundant and superfluous header
includes from xgifb.

Tested on hp t5325 (XGI Z11)

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --cc drivers/staging/xgifb/XGI_main.h
Simple merge

diff --cc drivers/staging/xgifb/XGI_main_26.c
Simple merge

diff --cc drivers/staging/xgifb/XGIfb.h
Simple merge

diff --cc drivers/staging/xgifb/vb_init.c
Simple merge

diff --cc drivers/staging/xgifb/vb_setmode.c
Simple merge

diff --cc drivers/staging/xgifb/vb_util.c
Simple merge

diff --cc drivers/staging/xgifb/vgatypes.h
Simple merge