hw: move DMA controllers to hw/dma/, configure with default-configs/

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/default-configs/sparc-softmmu.mak b/default-configs/sparc-softmmu.mak
index 6a2bad3..8c4d0a6 100644
--- a/default-configs/sparc-softmmu.mak
+++ b/default-configs/sparc-softmmu.mak
@@ -13,3 +13,5 @@
 CONFIG_SLAVIO=y
 CONFIG_CS4231=y
 CONFIG_GRLIB=y
+CONFIG_STP2000=y
+CONFIG_SUN4M=y