qcacld-3.0: Avoid redefining WLAN_AKM_SUITE_FT_PSK

Linux kernel versions 4.12+ define WLAN_AKM_SUITE_FT_PSK. Avoid
redefining WLAN_AKM_SUITE_FT_PSK when compiling against 4.12+ Linux
kernels.

Change-Id: I8fdf9dace90b88dab872dfe4eaacbe363568c6cc
CRs-Fixed: 2093927

core/hdd/src/wlan_hdd_cfg80211.c

@@ -158,7 +158,9 @@
 #define WLAN_AKM_SUITE_FT_8021X         0x000FAC03
 #endif
 
+#ifndef WLAN_AKM_SUITE_FT_PSK
 #define WLAN_AKM_SUITE_FT_PSK           0x000FAC04
+#endif
 
 #define HDD_CHANNEL_14 14