x86: boot secondary cpus through initial_code

remove "initialize_secondary". Boot both architectures via
initial_code.

Signed-off-by: Glauber Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/kernel/head_32.S b/arch/x86/kernel/head_32.S
index ffb73a5..f67e934 100644
--- a/arch/x86/kernel/head_32.S
+++ b/arch/x86/kernel/head_32.S
@@ -452,7 +452,7 @@
 	je   1f
 	movl $(__KERNEL_PERCPU), %eax
 	movl %eax,%fs		# set this cpu's percpu
-	jmp initialize_secondary # all other CPUs call initialize_secondary
+	movl (stack_start), %esp
 1:
 #endif /* CONFIG_SMP */
 	jmp *(initial_code)