[Patch] mips: do not redefine BUILD_BUG()

[Cong Wang <xiyou.wangcong@gmail.com>]

On mips, we got

include/linux/kernel.h:717:1: error: "BUILD_BUG" redefined
arch/mips/include/asm/page.h:43:1: error: this is the location of the previous 
definition
make[3]: *** [arch/mips/sgi-ip27/ip27-console.o] Error 1
make[2]: *** [arch/mips/sgi-ip27] Error 2
make[1]: *** [arch/mips] Error 2
make: *** [sub-make] Error 2

use generic BUILD_BUG() instead of re-defining one.

Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>

---
diff --git a/arch/mips/include/asm/page.h b/arch/mips/include/asm/page.h
index d417909..e14121a 100644
--- a/arch/mips/include/asm/page.h
+++ b/arch/mips/include/asm/page.h
@@ -39,9 +39,7 @@
 #define HPAGE_MASK     (~(HPAGE_SIZE - 1))
 #define HUGETLB_PAGE_ORDER     (HPAGE_SHIFT - PAGE_SHIFT)
 #else /* !CONFIG_HUGETLB_PAGE */
-# ifndef BUILD_BUG
-#  define BUILD_BUG() do { extern void __build_bug(void); __build_bug(); } 
while (0)
-# endif
+#include <linux/kernel.h>
 #define HPAGE_SHIFT    ({BUILD_BUG(); 0; })
 #define HPAGE_SIZE     ({BUILD_BUG(); 0; })
 #define HPAGE_MASK     ({BUILD_BUG(); 0; })