[POWERPC] Move declaration of tce variables into mmu-hash64.h

... instead of having extern declarations in a .c file.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/include/asm-powerpc/mmu-hash64.h b/include/asm-powerpc/mmu-hash64.h
index 0dff767..f35d1e1 100644
--- a/include/asm-powerpc/mmu-hash64.h
+++ b/include/asm-powerpc/mmu-hash64.h
@@ -181,6 +181,7 @@
 extern int mmu_kernel_ssize;
 extern int mmu_highuser_ssize;
 extern u16 mmu_slb_size;
+extern unsigned long tce_alloc_start, tce_alloc_end;
 
 /*
  * If the processor supports 64k normal pages but not 64k cache