More configcheck fixes.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/include/asm-mips/mach-au1x00/au1xxx_psc.h b/include/asm-mips/mach-au1x00/au1xxx_psc.h
index 283519d..8e5fb3c 100644
--- a/include/asm-mips/mach-au1x00/au1xxx_psc.h
+++ b/include/asm-mips/mach-au1x00/au1xxx_psc.h
@@ -33,6 +33,8 @@
 #ifndef _AU1000_PSC_H_
 #define _AU1000_PSC_H_
 
+#include <linux/config.h>
+
 /* The PSC base addresses.  */
 #ifdef CONFIG_SOC_AU1550
 #define PSC0_BASE_ADDR		0xb1a00000