Convert CONFIG_SYS_SRIO et al to Kconfig

This converts the following to Kconfig:
   CONFIG_SRIO1
   CONFIG_SRIO2
   CONFIG_SRIO_PCIE_BOOT_MASTER
   CONFIG_SYS_SRIO

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/MPC8548CDS_defconfig b/configs/MPC8548CDS_defconfig
index 0d21b89..2ac4f26 100644
--- a/configs/MPC8548CDS_defconfig
+++ b/configs/MPC8548CDS_defconfig
@@ -8,6 +8,8 @@
 CONFIG_ENV_ADDR=0xFFF60000
 CONFIG_MPC85xx=y
 CONFIG_SYS_INIT_RAM_LOCK=y
+CONFIG_SYS_SRIO=y
+CONFIG_SRIO1=y
 # CONFIG_CMD_ERRATA is not set
 CONFIG_TARGET_MPC8548CDS=y
 CONFIG_MPC85XX_HAVE_RESET_VECTOR=y