lower log level for "Write-combining range (0x0, 0x1000) was already clear"

[Winston]

Summary: I recommend that the importance (logverbose level) of this
	 message be reduced (made less important).

Details:

[It looks like my FreeBSD 9.0-RELEASE has xorg-7.5.1, so this problem may
 have been addressed already in later releases.]

Using the VESA driver, I'm accumulating about 20MB a day worth of:

(==) VESA(0): Write-combining range (0x0,0x1000) was already clear

in the Xorg.0.log file.  (Using the MGA driver, I get a few of these
(obviously with "MGA(0)" instead) at startup, but then none during
normal operation.)

Testing shows that these messages are logged when using any --logverbose
higher than 0.  Based solely on the message itself, it looks more like a
debugging aid, not something that should be logged under normal use.

I suggest reducing its log level (importance) unless there's some
non-obvious reason for it being at -logverbose 1 level.
 -WBE