MAINTAINERS: Update powerpc list

KVM development on powerpc has moved to the Linux on Power mailing list,
as per linux.git commit 19b27f37ca97d ("MAINTAINERS: Update powerpc KVM
entry").

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20230327124520.2707537-2-npiggin@gmail.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index bd1761d..e459e03 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -79,7 +79,7 @@
 M: Thomas Huth <thuth@redhat.com>
 S: Maintained
 L: kvm@vger.kernel.org
-L: kvm-ppc@vger.kernel.org
+L: linuxppc-dev@lists.ozlabs.org
 F: powerpc/
 F: lib/powerpc/
 F: lib/ppc64/