mibstore.h and its miInitializeBackingStore() have been otherwise empty
since at least xorg-server 1.10. remove all reference to them as the
header is gone in xorg-server 1.18.

Remove unnecessary unistd.h inclusion.
Reduces diff to upstream.

Adjust previous: the cast should be to (unsigned long), not (long),
since the value is printed in hex and we don't want sign extension.

printf format fix: cast to (long) when printing with "%lX" format.

In XGI_GetTVPtrIndex2(), return the correct value through *tempch
by using (*tempch)++ instead of *tempch++.
Found using clang -Wunused-value.

Add returns in non-void functions. Found using clang -Wreturn-type.

printf format fixes, found using clang -Wformat.
Some are fixed by adding casts, some by changing the format string,
and some by changing the type of the variable.

some more gcc appeasing
( now why did that fire a warning on i386 but not amd64? )

make this compile on NetBSD, still needs to be tested on actual hardware
( hi msaitoh@ )

remove accitentially imported garbage

initial import of xf86-video-xgi-1.6.0