wlan: Support for PMKSA caching

propagation from qcacld-3.0 to prima

Add support for PMK and PMKID cache based on either bssid or
ssid + cache identifier

CRs-Fixed: 2531198
Change-Id: Ic29b9dc3ad0c6c3d56af297494bc746d78e838d5
diff --git a/CORE/MAC/inc/sirApi.h b/CORE/MAC/inc/sirApi.h
index 4d51fdb..7227be3 100644
--- a/CORE/MAC/inc/sirApi.h
+++ b/CORE/MAC/inc/sirApi.h
@@ -149,6 +149,8 @@
 #define PERIODIC_TX_PTRN_MAX_SIZE 1536
 #define MAXNUM_PERIODIC_TX_PTRNS 6
 
+/* Cache ID length */
+#define CACHE_ID_LEN 2
 
 #ifdef WLAN_FEATURE_EXTSCAN