qcacmn: Reduce maximum contiguous allocation size

Reduce default max contiguous allocation in wlan_cfg to 2MB.

Change-Id: If97bb4aaaab48d3435a4992e951ab02ef891d1e2

wlan_cfg/wlan_cfg.c

@@ -67,7 +67,7 @@
 
 #define WLAN_CFG_DP_TX_NUM_POOLS 3
 /* Change this to a lower value to enforce scattered idle list mode */
-#define WLAN_CFG_MAX_ALLOC_SIZE (32 << 20)
+#define WLAN_CFG_MAX_ALLOC_SIZE (2 << 20)
 
 #define WLAN_CFG_MAX_CLIENTS 64