Kernel/x86: Move RTC and CMOS code to x86 arch-specific subdirectory

The RTC and CMOS are currently only supported for x86 platforms and use
specific x86 instructions to produce only certain x86 plaform operations
and results, therefore, we move them to the Arch/x86 specific directory.

Kernel/Memory/MemoryManager.cpp

@@ -14,7 +14,6 @@
 #include <Kernel/Arch/PageFault.h>
 #include <Kernel/Arch/RegisterState.h>
 #include <Kernel/BootInfo.h>
-#include <Kernel/CMOS.h>
 #include <Kernel/FileSystem/Inode.h>
 #include <Kernel/Heap/kmalloc.h>
 #include <Kernel/KSyms.h>