kernel_ldr: finish implementing all core logic.

libraries/libmesosphere/include/mesosphere/board/nintendo/switch/kern_k_system_control.hpp

@@ -25,6 +25,10 @@ namespace ams::kern {
             static KPhysicalAddress GetKernelPhysicalBaseAddress(uintptr_t base_address);
             static bool ShouldIncreaseResourceRegionSize();
 
+            /* Randomness. */
+            static void GenerateRandomBytes(void *dst, size_t size);
+            static u64  GenerateRandomRange(u64 min, u64 max);
+
             /* Panic. */
             static NORETURN void StopSystem();
     };