Use glib memory allocation and free functions

qemu_malloc/qemu_free no longer exist after this commit.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/grlib_irqmp.c b/hw/grlib_irqmp.c
index b8738fc..9490a78 100644
--- a/hw/grlib_irqmp.c
+++ b/hw/grlib_irqmp.c
@@ -345,7 +345,7 @@
                                         grlib_irqmp_write,
                                         irqmp, DEVICE_NATIVE_ENDIAN);
 
-    irqmp->state = qemu_mallocz(sizeof *irqmp->state);
+    irqmp->state = g_malloc0(sizeof *irqmp->state);
 
     if (irqmp_regs < 0) {
         return -1;