qcacmn: Reduce min slab size allocation to <1M

System running out of 2M chunks inspite of large
free memory available. This is WAR till original
issue is root caused.

Change-Id: I379f8a56c31d76b74164a85978659d87ad74f87b
CRs-fixed: 2436495

wlan_cfg/cfg_dp.h

@@ -31,7 +31,7 @@
 
 /* Change this to a lower value to enforce scattered idle list mode */
 #define WLAN_CFG_MAX_ALLOC_SIZE 0x200000
-#define WLAN_CFG_MAX_ALLOC_SIZE_MIN 0x200000
+#define WLAN_CFG_MAX_ALLOC_SIZE_MIN 0x80000
 #define WLAN_CFG_MAX_ALLOC_SIZE_MAX 0x200000
 
 #define WLAN_CFG_NUM_TCL_DATA_RINGS 3