ppc: Remove MPC8555CDS boards

These boards have not been converted to CONFIG_DM_PCI by the deadline and is
also missing conversion to CONFIG_DM.  Remove them.  As this is the only
ARCH_MPC8555 platform left, remove that support as well.

Cc: Priyanka Jain <priyanka.jain@nxp.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/ddr/fsl/ctrl_regs.c b/drivers/ddr/fsl/ctrl_regs.c
index b800344..b5122d1 100644
--- a/drivers/ddr/fsl/ctrl_regs.c
+++ b/drivers/ddr/fsl/ctrl_regs.c
@@ -1863,25 +1863,13 @@
 static void set_ddr_sdram_clk_cntl(fsl_ddr_cfg_regs_t *ddr,
 					 const memctl_options_t *popts)
 {
-	unsigned int clk_adjust;	/* Clock adjust */
-	unsigned int ss_en = 0;		/* Source synchronous enable */
-
-#if defined(CONFIG_ARCH_MPC8555)
-	/* Per FSL Application Note: AN2805 */
-	ss_en = 1;
-#endif
-	if (fsl_ddr_get_version(0) >= 0x40701) {
+	if (fsl_ddr_get_version(0) >= 0x40701)
 		/* clk_adjust in 5-bits on T-series and LS-series */
-		clk_adjust = (popts->clk_adjust & 0x1F) << 22;
-	} else {
+		ddr->ddr_sdram_clk_cntl = (popts->clk_adjust & 0x1F) << 22;
+	else
 		/* clk_adjust in 4-bits on earlier MPC85xx and P-series */
-		clk_adjust = (popts->clk_adjust & 0xF) << 23;
-	}
+		ddr->ddr_sdram_clk_cntl = (popts->clk_adjust & 0xF) << 23;
 
-	ddr->ddr_sdram_clk_cntl = (0
-				   | ((ss_en & 0x1) << 31)
-				   | clk_adjust
-				   );
 	debug("FSLDDR: clk_cntl = 0x%08x\n", ddr->ddr_sdram_clk_cntl);
 }