control: Add FIXME in reset handling

windows_reset_all() doesn't perform a flush of the currently open
window like the comment suggests. Iron out whether the comment or the
behaviour is incorrect.

Change-Id: Id10384651c02e397f4c8d2a749b66f8881bfe08b
Signed-off-by: Andrew Jeffery <andrew@aj.id.au>

control.c

@@ -43,6 +43,7 @@ int control_reset(struct mbox_context *context)
 		return -EBUSY;
 	}
 
+	/* FIXME: Comment below is wrong: windows_reset_all() does not flush! */
 	/*
 	 * This will close (and flush) the current window and reset the lpc bus
 	 * mapping back to flash, or memory in case we're using a virtual pnor.