mei: move hw dependent functions to interface.c

1. move direct register handling to interface.c and make them static
2. add new function mei_clear_interrupts that wraps direct register
access
3. export other functions in mei_dev.h

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 08884ef..eb18055 100644
--- a/drivers/misc/mei/init.c
+++ b/drivers/misc/mei/init.c
@@ -142,8 +142,7 @@
 	    dev->host_hw_state, dev->me_hw_state);
 
 	/* acknowledge interrupt and stop interupts */
-	if ((dev->host_hw_state & H_IS) == H_IS)
-		mei_reg_write(dev, H_CSR, dev->host_hw_state);
+	mei_clear_interrupts(dev);
 
 	/* Doesn't change in runtime */
 	dev->hbuf_depth = (dev->host_hw_state & H_CBD) >> 24;