fix: preserve bootinfo pointer in kernel _start

Kernel/Source/Arch/entry.S

@@ -1,6 +1,10 @@
 .section .text.boot, "ax"
 .global _start
 _start:
+    sub sp, sp, #16
+    str x0, [sp]
     bl ExceptionsVectorsInit
+    ldr x0, [sp]
+    add sp, sp, #16
     bl KernelMain
     b .

Kernel/Source/KernelMain.c

@@ -1,5 +1,7 @@
 #include <OS/Log.h>
+#include "../Common/bootinfo.h"
 
-void KernelMain(void) {
+void KernelMain(Bootinfo* bootinfo) {
-    OSLog("Hi meow! ;3\n");
+    OSLog("DTB located at 0x%x\n", bootinfo->dtb);
+    OSLog("Kernel located at 0x%x\n", bootinfo->kernelInfo.kernelAddress);
 }