board_f: powerpc: Make prt_8260_rsr(), prt_8260_clks() private

Move these two function calls into checkcpu(), which is called on this
arch immediately after these two.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/arch/powerpc/cpu/mpc8260/cpu.c b/arch/powerpc/cpu/mpc8260/cpu.c
index 9f2be3c..58d1c02 100644
--- a/arch/powerpc/cpu/mpc8260/cpu.c
+++ b/arch/powerpc/cpu/mpc8260/cpu.c
@@ -50,7 +50,14 @@
 	uint pvr = get_pvr ();
 	uint immr, rev, m, k;
 	char buf[32];
+	int ret;
 
+	ret = prt_8260_rsr();
+	if (ret)
+		return ret;
+	ret = prt_8260_clks();
+	if (ret)
+		return ret;
 	puts ("CPU:   ");
 
 	switch (pvr) {