qcacmn: Fix for early free of IPA global varible

With multiple radio supporting IPA offload path, the g_ipa_config
is getting free when doing wifi unload for single radio, which is
leading to an issue of early free of g_ipa_config variable.
Fix is check if all the soc are down and then only free the
global struct for IPA.

Change-Id: If8fbc7a72c91a26e6f9e680711cd58429f8a1e99
CRs-Fixed: 3137091

ipa/core/src/wlan_ipa_main.c

@@ -59,6 +59,7 @@ QDF_STATUS ipa_config_mem_alloc(void)
 
 void ipa_config_mem_free(void)
 {
+	if (!g_instances_added) {
 		if (!g_ipa_config) {
 			ipa_err("IPA config already freed");
 			return;
@@ -66,6 +67,7 @@ void ipa_config_mem_free(void)
 
 		qdf_mem_free(g_ipa_config);
 		g_ipa_config = NULL;
+	}
 }
 
 bool ipa_is_hw_support(void)