hocclk: reduce ram usage and add display undervolt

Source/hoc-clk/sysmodule/perms.json

@@ -3,13 +3,14 @@
 	"title_id": "0x00FF0000636C6BFF",
 	"title_id_range_min": "0x00FF0000636C6BFF",
 	"title_id_range_max": "0x00FF0000636C6BFF",
-	"main_thread_stack_size": "0x0000C000",
+	"main_thread_stack_size": "0x0000D000",
 	"main_thread_priority": 16,
 	"default_cpu_id": 3,
 	"process_category": 1,
 	"is_retail": true,
 	"pool_partition": 2,
 	"is_64_bit": true,
+	"optimize_memory_allocation": true,
 	"address_space_type": 3,
 	"filesystem_access": {
 		"permissions": "0xFFFFFFFFFFFFFFFF"