i386: Fix start_kernel warning

Fix

WARNING: vmlinux.o(.text+0x183): Section mismatch: reference to .init.text:start_kernel (between 'is386' and 'check_x87')
Signed-off-by: NAndi Kleen <ak@suse.de>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/i386/kernel/head.S

@@ -162,9 +162,7 @@ page_pde_offset = (__PAGE_OFFSET >> 20);
  * which will be freed later
  */
 
-#ifdef CONFIG_HOTPLUG_CPU
-.section .text,"ax",@progbits
-#else
+#ifndef CONFIG_HOTPLUG_CPU
 .section .init.text,"ax",@progbits
 #endif