x86: move z_x86_early_serial_init()

This works with long mode as well, uplevel to
common kernel_arch_func.h.

Signed-off-by: Andrew Boie <[email protected]>

Author: Andrew Boie

arch/x86/include/ia32/kernel_arch_func.h

@@ -23,11 +23,6 @@ extern "C" {
 #define STACK_ROUND_UP(x) ROUND_UP(x, STACK_ALIGN_SIZE)
 #define STACK_ROUND_DOWN(x) ROUND_DOWN(x, STACK_ALIGN_SIZE)
 
-#ifdef CONFIG_X86_VERY_EARLY_CONSOLE
-/* Setup ultra-minimal serial driver for printk() */
-void z_x86_early_serial_init(void);
-#endif
-
 /* Create all page tables with boot configuration and enable paging */
 void z_x86_paging_init(void);
 

arch/x86/include/kernel_arch_func.h

@@ -31,6 +31,11 @@ struct multiboot_info;
 
 extern FUNC_NORETURN void z_x86_prep_c(int dummy, struct multiboot_info *info);
 
+#ifdef CONFIG_X86_VERY_EARLY_CONSOLE
+/* Setup ultra-minimal serial driver for printk() */
+void z_x86_early_serial_init(void);
+#endif /* CONFIG_X86_VERY_EARLY_CONSOLE */
+
 #endif
 
 #endif /* ZEPHYR_ARCH_X86_INCLUDE_KERNEL_ARCH_FUNC_H_ */