global: Migrate CONFIG_SYS_MPC8* symbols to the CFG_SYS namespace

Migrate all of COFIG_SYS_MPC* to the CFG_SYS namespace.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/spi/fsl_espi.c b/drivers/spi/fsl_espi.c
index c7a6926..b1d964d 100644
--- a/drivers/spi/fsl_espi.c
+++ b/drivers/spi/fsl_espi.c
@@ -390,7 +390,7 @@
 	if (!fsl)
 		return NULL;
 
-	fsl->espi = (void *)(CONFIG_SYS_MPC85xx_ESPI_ADDR);
+	fsl->espi = (void *)(CFG_SYS_MPC85xx_ESPI_ADDR);
 	fsl->mode = mode;
 	fsl->max_transfer_length = ESPI_MAX_DATA_TRANSFER_LEN;
 	fsl->speed_hz = max_hz;