kern: implement KHandleTable, other cleanup

libraries/libmesosphere/include/mesosphere/arch/arm64/init/kern_k_init_page_table.hpp

@@ -15,7 +15,7 @@
  */
 #pragma once
 #include <vapours.hpp>
-#include <mesosphere/kern_panic.hpp>
+#include <mesosphere/kern_common.hpp>
 #include <mesosphere/kern_k_typed_address.hpp>
 #include <mesosphere/kern_select_cpu.hpp>
 

libraries/libmesosphere/include/mesosphere/arch/arm64/kern_cpu.hpp

@@ -15,7 +15,7 @@
  */
 #pragma once
 #include <vapours.hpp>
-#include "kern_cpu_system_registers.hpp"
+#include <mesosphere/arch/arm64/kern_cpu_system_registers.hpp>
 
 namespace ams::kern::arm64::cpu {