[MIPS] Fix marge error due to conflict in arch/mips/kernel/head.S

__INIT directive just before kernel_entry was ignored for most platforms.
This patch fixes it and get rid of this warning:

WARNING: vmlinux.o(.text+0x478): Section mismatch: reference to .init.text:start_kernel (between '_stext' and 'run_init_process')
Signed-off-by: NAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/kernel/head.S

@@ -141,7 +141,7 @@
 EXPORT(stext)					# used for profiling
 EXPORT(_stext)
 
-#ifdef CONFIG_BOOT_RAW
+#ifndef CONFIG_BOOT_RAW
 	/*
 	 * Give us a fighting chance of running if execution beings at the
 	 * kernel load address.  This is needed because this platform does