HDD : Increase private data length in hdd ioctl

increase the private data length to 8K from 4K for sta
and sap mode as needed by few ioctls.

Change-Id: I76a417e51f4e43bc8e63f338a061792d9bd99948
CRs-fixed: 634163
diff --git a/CORE/HDD/src/wlan_hdd_main.c b/CORE/HDD/src/wlan_hdd_main.c
index 54b0077..1b8094e 100644
--- a/CORE/HDD/src/wlan_hdd_main.c
+++ b/CORE/HDD/src/wlan_hdd_main.c
@@ -182,8 +182,11 @@
                                      tCsrEseBeaconReq *pEseBcnReq);
 #endif /* FEATURE_WLAN_ESE && FEATURE_WLAN_ESE_UPLOAD */
 
-#define WLAN_PRIV_DATA_MAX_LEN 4096
-
+/*
+ * Maximum buffer size used for returning the data back to user space
+ */
+#define WLAN_MAX_BUF_SIZE 1024
+#define WLAN_PRIV_DATA_MAX_LEN    8192
 /*
  * Driver miracast parameters 0-Disabled
  * 1-Source, 2-Sink