ddr: fsl: Remove CONFIG_MEM_INIT_VALUE

The way all of the memory init code here works is that we pass
0xDEADBEEF around for the initial value (as it's a well known 'poison'
value and so easily recognized in debuggers, etc). The only point of
this CONFIG symbol was to pass in a different value for that purpose.
Drop this symbol and cleanup the code slightly.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/ddr/fsl/mpc85xx_ddr_gen1.c b/drivers/ddr/fsl/mpc85xx_ddr_gen1.c
index 0f1e99e..16186bd 100644
--- a/drivers/ddr/fsl/mpc85xx_ddr_gen1.c
+++ b/drivers/ddr/fsl/mpc85xx_ddr_gen1.c
@@ -73,7 +73,7 @@
 	struct ccsr_ddr __iomem *ddr =
 		(struct ccsr_ddr __iomem *)(CFG_SYS_FSL_DDR_ADDR);
 
-	dma_meminit(CONFIG_MEM_INIT_VALUE, dram_size);
+	dma_meminit(dram_size);
 
 	/*
 	 * Enable errors for ECC.