drivers: virtio: Add virtio-mmio-blk

Summary:
- This commit adds virtio-mmio-blk driver

Impact:
- None

Testing:
- Tested with rv-virt:netnsh which will be updated later

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

drivers/virtio/Make.defs

@@ -28,6 +28,10 @@ ifeq ($(CONFIG_DRIVERS_VIRTIO_NET),y)
   CSRCS += virtio-mmio-net.c
 endif
 
+ifeq ($(CONFIG_DRIVERS_VIRTIO_BLK),y)
+  CSRCS += virtio-mmio-blk.c
+endif
+
 # Include build support
 
 DEPPATH += --dep-path virtio