Avoid forward references to enum types in ieee802_11_common.h

These are not allowed in ISO C++ (and well, not really in ISO C either,
but that does not result in compiler warning without pedantic
compilation).

Since ieee802_11_common.h may end up getting pulled into C++ code for
some external interfaces, it is more convenient to keep it free of these
cases. Pull in ieee802_11_defs.h to get enum phy_type defined and move
enum chan_width to common/defs.h (which was already pulled in into
src/drivers/driver.h and src/common/ieee802_11_common.h).

Signed-off-by: Jouni Malinen <jouni@codeaurora.org>

src/common/defs.h

@@ -408,4 +408,15 @@ enum eap_proxy_sim_state {
 #define OCE_STA_CFON BIT(1)
 #define OCE_AP BIT(2)
 
+/* enum chan_width - Channel width definitions */
+enum chan_width {
+	CHAN_WIDTH_20_NOHT,
+	CHAN_WIDTH_20,
+	CHAN_WIDTH_40,
+	CHAN_WIDTH_80,
+	CHAN_WIDTH_80P80,
+	CHAN_WIDTH_160,
+	CHAN_WIDTH_UNKNOWN
+};
+
 #endif /* DEFS_H */

src/common/ieee802_11_common.h

@@ -10,9 +10,9 @@
 #define IEEE802_11_COMMON_H
 
 #include "defs.h"
+#include "ieee802_11_defs.h"
 
 struct hostapd_hw_modes;
-enum chan_width;
 
 #define MAX_NOF_MB_IES_SUPPORTED 5
 

src/drivers/driver.h

@@ -1939,17 +1939,6 @@ enum smps_mode {
 	SMPS_INVALID,
 };
 
-/* enum chan_width - Channel width definitions */
-enum chan_width {
-	CHAN_WIDTH_20_NOHT,
-	CHAN_WIDTH_20,
-	CHAN_WIDTH_40,
-	CHAN_WIDTH_80,
-	CHAN_WIDTH_80P80,
-	CHAN_WIDTH_160,
-	CHAN_WIDTH_UNKNOWN
-};
-
 #define WPA_INVALID_NOISE 9999
 
 /**