Changed back to lower half kernel, since im dump.

I dont see the benefit of higher half (and could not get multiboot info)

kernel/include/kernel/tty.h

@@ -3,11 +3,8 @@
 #include <stddef.h>
 #include <sys/cdefs.h>
 
-__BEGIN_DECLS
 
 void terminal_initialize();
 void terminal_putchar(char c);
 void terminal_write(const char* data, size_t size);
 void terminal_writestring(const char* data);
-
-__END_DECLS