powerpc, 5xxx, 512x: remove support for mpc5xxx and mpc512x

There was for long time no activity in the mpx5xxx area.
We need to go further and convert to Kconfig, but it
turned out, nobody is interested anymore in mpc5xxx,
so remove it.

Signed-off-by: Heiko Schocher <hs@denx.de>
diff --git a/common/board_f.c b/common/board_f.c
index 8bf9acc..850d19d 100644
--- a/common/board_f.c
+++ b/common/board_f.c
@@ -550,7 +550,7 @@
 #if defined(CONFIG_E500) || defined(CONFIG_MPC86xx)
 	bd->bi_immr_base = CONFIG_SYS_IMMR;	/* base  of IMMR register     */
 #endif
-#if defined(CONFIG_MPC5xxx) || defined(CONFIG_M68K)
+#if defined(CONFIG_M68K)
 	bd->bi_mbar_base = CONFIG_SYS_MBAR;	/* base of internal registers */
 #endif
 #if defined(CONFIG_MPC83xx)
@@ -574,13 +574,6 @@
 	bd->bi_sccfreq = gd->arch.scc_clk;
 	bd->bi_vco = gd->arch.vco_out;
 #endif /* CONFIG_CPM2 */
-#if defined(CONFIG_MPC512X)
-	bd->bi_ipsfreq = gd->arch.ips_clk;
-#endif /* CONFIG_MPC512X */
-#if defined(CONFIG_MPC5xxx)
-	bd->bi_ipbfreq = gd->arch.ipb_clk;
-	bd->bi_pcifreq = gd->pci_clk;
-#endif /* CONFIG_MPC5xxx */
 #if defined(CONFIG_M68K) && defined(CONFIG_PCI)
 	bd->bi_pcifreq = gd->pci_clk;
 #endif