qcacmn: Add support to configure buffer size from kbuild

Add support to configure logging buffer size from
per-OEM kbuild based on memory requirement.

Change-Id: Ia91d79e5e738b1c9787015de101c3f67ccde46aa
CRs-Fixed: 2253438

utils/logging/inc/wlan_roam_debug.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2017 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2013-2018 The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for
  * any purpose with or without fee is hereby granted, provided that the
@@ -44,7 +44,10 @@ struct wlan_roam_debug_rec {
 	uint32_t arg2;
 };
 
+#ifndef WLAN_ROAM_DEBUG_MAX_REC
 #define WLAN_ROAM_DEBUG_MAX_REC 256
+#endif
+
 /**
  * struct wlan_roam_debug_info - Buffer to store the wma debug records
  * @index: index of the most recent entry in the circular buffer