MAINTAINERS: update sparc maintainer

Reflect the current situation where David Miller
is the sparc maintainer.

I have tried to contact Bill on following adresses:

    wli@holomorphy.com
    wlirwin@us.ibm.com

with no success and Bill has not been active on the
sparclinux mailing list for a long time.

As sparc and sparc64 are unified I unified the two entries
in the MAINTAINERS file too.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

MAINTAINERS

@@ -4015,10 +4015,12 @@ L:	alsa-devel@alsa-project.org (subscribers-only)
 W:	http://alsa-project.org/main/index.php/ASoC
 S:	Supported
 
-SPARC (sparc32)
-P:	William L. Irwin
-M:	wli@holomorphy.com
+SPARC + UltraSPARC (sparc/sparc64)
+P:	David S. Miller
+M:	davem@davemloft.net
 L:	sparclinux@vger.kernel.org
+T:	git kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6.git
+T:	git kernel.org:/pub/scm/linux/kernel/git/davem/sparc-next-2.6.git
 S:	Maintained
 
 SPECIALIX IO8+ MULTIPORT SERIAL CARD DRIVER
@@ -4302,13 +4304,6 @@ M:	dushistov@mail.ru
 L:	linux-kernel@vger.kernel.org
 S:	Maintained
 
-UltraSPARC (sparc64)
-P:	David S. Miller
-M:	davem@davemloft.net
-L:	sparclinux@vger.kernel.org
-T:	git kernel.org:/pub/scm/linux/kernel/git/davem/sparc-2.6.git
-S:	Maintained
-
 ULTRA-WIDEBAND (UWB) SUBSYSTEM:
 P:	David Vrabel
 M:	david.vrabel@csr.com