kernel: fix compile error with gcc-4.8 and kernel 3.3

With gcc-4.8 I get a compile error with kernel 3.3.
This patch fixes this problem by backporting a patch from a more recent kernel version.

  CC      arch/mips/mm/page.o
arch/mips/mm/page.c:89:6: error: 'clear_page' alias in between function and variable is not supported
 void clear_page(void *page) __attribute__((alias("clear_page_array")));
      ^
arch/mips/mm/page.c:84:12: error: 'clear_page_array' aliased declaration [-Werror]
 static u32 clear_page_array[0x120 / 4];
            ^
arch/mips/mm/page.c:108:6: error: 'copy_page' alias in between function and variable is not supported
 void copy_page(void *to, void *from) __attribute__((alias("copy_page_array")));
      ^
arch/mips/mm/page.c:102:12: error: 'copy_page_array' aliased declaration [-Werror]
 static u32 copy_page_array[0x540 / 4];
            ^
arch/mips/mm/page.c:108:6: error: 'copy_page' alias in between function and variable is not supported
 void copy_page(void *to, void *from) __attribute__((alias("copy_page_array")));
      ^
arch/mips/mm/page.c:102:12: error: 'copy_page_array' aliased declaration [-Werror]
 static u32 copy_page_array[0x540 / 4];
            ^
arch/mips/mm/page.c:89:6: error: 'clear_page' alias in between function and variable is not supported
 void clear_page(void *page) __attribute__((alias("clear_page_array")));
      ^
arch/mips/mm/page.c:84:12: error: 'clear_page_array' aliased declaration [-Werror]
 static u32 clear_page_array[0x120 / 4];
            ^
cc1: all warnings being treated as errors
make[7]: *** [arch/mips/mm/page.o] Error 1

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@40619 3c298f89-4303-0410-b956-a3cf2f4a3e73