drivers/ati/theatre200.h uses variadic macros - not well supported

[Kean Johnston]

The title says it all. theater200.h uses variadic macros, which
although defined in C99, are still not well adopted. Its breaking
compiles on UnixWare, for at least one. This code can be written
more portably, albeing a bit more verbosely. Is this the right
place to report this to or is there someone/somewhere specific
to the ATI driver I should contact?

TIA

Kean