lib: Fix multiple definitions of clz_tab

Both sparc 32-bit's software divide assembler and MPILIB provide
clz_tab[] with identical contents.

Break it out into a seperate object file and select it when
SPARC32 or MPILIB is set.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: James Morris <jmorris@namei.org>
diff --git a/lib/Makefile b/lib/Makefile
index d71aae1..18515f0 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -121,6 +121,8 @@
 obj-$(CONFIG_MPILIB) += mpi/
 obj-$(CONFIG_SIGNATURE) += digsig.o
 
+obj-$(CONFIG_CLZ_TAB) += clz_tab.o
+
 hostprogs-y	:= gen_crc32table
 clean-files	:= crc32table.h