lib: lte_link_control: request HEAP size

Registering LTE event handlers requires HEAP to succeed, as
`lte_lc_register_handler` calls into `k_malloc`.

Signed-off-by: Jordan Yates <[email protected]>

Author: JordanYates

lib/lte_link_control/Kconfig

@@ -14,6 +14,13 @@ menuconfig LTE_LINK_CONTROL
 
 if LTE_LINK_CONTROL
 
+config HEAP_MEM_POOL_ADD_SIZE_LTE_LINK_CONTROL
+	int "Heap required for event handlers"
+	default 32
+	help
+	  Extra heap size required for allocating event handlers.
+	  Default is enough for 4 handlers.
+
 # Modules: these Kconfig options enable specific features of the library.
 
 config LTE_LC_CONN_EVAL_MODULE