[MIPS] Fix CONFIG_BOOT_RAW.

This was broken by 017e3a492683b32d17dcd1b13b279745cc656073 (lmo) /
396a2ae08e5080b140330645743ab2567f6bc426 (kernel.org).

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/head.S b/arch/mips/kernel/head.S
index 2367687..50be56c 100644
--- a/arch/mips/kernel/head.S
+++ b/arch/mips/kernel/head.S
@@ -136,7 +136,8 @@
 	 * kernel load address.  This is needed because this platform does
 	 * not have a ELF loader yet.
 	 */
-	__INIT
+FEXPORT(__kernel_entry)
+	j	kernel_entry
 #endif
 
 	__INIT_REFOK