char: rename CharDriverState Chardev

Pick a uniform chardev type name.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/hw/lm32/milkymist-hw.h b/hw/lm32/milkymist-hw.h
index 4418b44..d3be0cf 100644
--- a/hw/lm32/milkymist-hw.h
+++ b/hw/lm32/milkymist-hw.h
@@ -6,7 +6,7 @@
 
 static inline DeviceState *milkymist_uart_create(hwaddr base,
                                                  qemu_irq irq,
-                                                 CharDriverState *chr)
+                                                 Chardev *chr)
 {
     DeviceState *dev;