Kernel: Allow modules to link against anything in kernel.map :^)

We now use the symbols from kernel.map to link modules as they are
loaded into the kernel. This is pretty fricken cool!

Kernel/KSyms.h

@@ -8,6 +8,7 @@ struct KSym {
     const char* name;
 };
 
+u32 address_for_kernel_symbol(const char* name);
 const KSym* ksymbolicate(u32 address);
 void load_ksyms();