r600/sfn: extend life range of all variables by one

This is a strange fix for some gles 3.1 tests with atomics. Maybed
the register holding the atomic add value can't be re-used in the
first instruction after an GDS instruction.

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6925>
1 file changed