Kernel: Move common aarch64 asm functions into kernel folder and NS

Author: https://github.com/jamesmintram
Commit: c2d7e200eb
Pull-request: https://github.com/SerenityOS/serenity/pull/10514
Reviewed-by: https://github.com/mundak ✅
Reviewed-by: https://github.com/nico

Kernel/Prekernel/Arch/aarch64/init.cpp

@@ -7,6 +7,7 @@
 
 #include <AK/Types.h>
 
+#include <Kernel/Arch/aarch64/Aarch64Asm.h>
 #include <Kernel/Prekernel/Arch/aarch64/Aarch64_asm_utils.h>
 #include <Kernel/Prekernel/Arch/aarch64/BootPPMParser.h>
 #include <Kernel/Prekernel/Arch/aarch64/Framebuffer.h>
@@ -36,7 +37,7 @@ extern "C" [[noreturn]] void init()
     uart.print_str("\r\n");
 
     uart.print_str("CPU started in: EL");
-    uart.print_num(static_cast<u64>(get_current_exception_level()));
+    uart.print_num(static_cast<u64>(Kernel::get_current_exception_level()));
     uart.print_str("\r\n");
 
     uart.print_str("Drop CPU to EL1\r\n");