rtlwifi: Prepare existing drivers for new driver

A driver for the RTL8723BE will soon be added. This patch adds the
necessary parts to the common headers, and modifies the existing
drivers for those changes.

Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rtlwifi/pci.h b/drivers/net/wireless/rtlwifi/pci.h
index d3262ec..2a33335 100644
--- a/drivers/net/wireless/rtlwifi/pci.h
+++ b/drivers/net/wireless/rtlwifi/pci.h
@@ -199,6 +199,10 @@
 
 	u16 shortretry_limit;
 	u16 longretry_limit;
+
+	/* MSI support */
+	bool msi_support;
+	bool using_msi;
 };
 
 struct mp_adapter {