qcacld-3.0: Add debugfs support for roam scan stats

Add debugfs entry to get last five roam scan stats info which includes
old bssid, new bssid, roaming candidates etc., for STA interface.

Change-Id: Ied66beb270d97b6e17a6116c1be0e82783094519
CRs-Fixed: 2203885
diff --git a/core/mac/src/include/sir_params.h b/core/mac/src/include/sir_params.h
index 67f93a2..d037f8a 100644
--- a/core/mac/src/include/sir_params.h
+++ b/core/mac/src/include/sir_params.h
@@ -686,6 +686,7 @@
 #define SIR_HAL_OBSS_COLOR_COLLISION_INFO   (SIR_HAL_ITC_MSG_TYPES_BEGIN + 397)
 
 #define SIR_HAL_SEND_ADDBA_REQ              (SIR_HAL_ITC_MSG_TYPES_BEGIN + 398)
+#define SIR_HAL_GET_ROAM_SCAN_STATS         (SIR_HAL_ITC_MSG_TYPES_BEGIN + 399)
 #define SIR_HAL_MSG_TYPES_END               (SIR_HAL_MSG_TYPES_BEGIN + 0x1FF)
 
 /* CFG message types */