mei: separate compilation of the ME hardware specifics

We add struct mei_hw_ops to virtualize access to hw specific
configurations. This allows us to separate the compilation
of the ME interface from the ME hardware specifics

Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c
index 1e1876f..51a005e 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -104,7 +104,7 @@
 		goto err;
 	}
 
-	if (!mei_me_is_ready(dev)) {
+	if (!mei_hw_is_ready(dev)) {
 		dev_err(&dev->pdev->dev, "ME is not ready.\n");
 		goto err;
 	}