selftests/powerpc: Move get_auxv_entry() to harness.c

Move get_auxv_entry() from pmu/lib.c up to harness.c in order to make
it available to other tests.

Signed-off-by: Sam Bobroff <sam.bobroff@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
diff --git a/tools/testing/selftests/powerpc/utils.h b/tools/testing/selftests/powerpc/utils.h
index 2ec455e..b7d4108 100644
--- a/tools/testing/selftests/powerpc/utils.h
+++ b/tools/testing/selftests/powerpc/utils.h
@@ -20,7 +20,7 @@
 
 
 int test_harness(int (test_function)(void), char *name);
-
+extern void *get_auxv_entry(int type);
 
 /* Yes, this is evil */
 #define FAIL_IF(x)						\