r300g: remove enabled/disabled hyperz and AA compression messages

It's annoying with octave. Reported by Michael Burian.

Cc: 10.2 10.3 <mesa-stable@lists.freedesktop.org>
(cherry picked from commit f058c6bbd1674bbbe1e1ef5f6f14b95307ec6312)
mesa: fix UNCLAMPED_FLOAT_TO_UBYTE() macro for MSVC

MSVC replaces the "F" in "255.0F" with the macro argument which leads
to an error.  s/F/FLT/ to avoid that.

It turns out we weren't using this macro at all on MSVC until the
recent "mesa: Drop USE_IEEE define." change.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
(cherry picked from commit 9608193cbc6ea14e49adcd0193f9e7c6058d5a2f)
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=85918
Nominated-by: Roland Scheidegger <sroland@vmware.com>