[POWERPC] Remove duplicate export of __div64_32.

Change 3927f2e8 moved lib/lib64.c from
lib-y to obj-y, preventing the export in ppc_ksyms.c from overriding
the one in lib, and thus causing a duplicate-export warning.
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>

arch/powerpc/kernel/ppc_ksyms.c

@@ -66,7 +66,6 @@ EXPORT_SYMBOL(clear_pages);
 EXPORT_SYMBOL(ISA_DMA_THRESHOLD);
 EXPORT_SYMBOL(DMA_MODE_READ);
 EXPORT_SYMBOL(DMA_MODE_WRITE);
-EXPORT_SYMBOL(__div64_32);
 
 EXPORT_SYMBOL(do_signal);
 EXPORT_SYMBOL(transfer_to_handler);