rockchip: rk3399-roc-pc: default to SPI bus 1 for SPI-flash

SPI flash on this board is located on bus 1, default to using bus 1 for
SPI flash on both rk3399-roc-pc and -mezzanine, and stop aliasing it to
bus 0.

Signed-off-by: Hugh Cole-Baker <sigmaris@gmail.com>
Suggested-by: Simon Glass <sjg@chromium.org>
Fixes: c4cea2bb ("rockchip: Enable building a SPI ROM image on bob")
Reviewed-by: Kever Yang<kever.yang@rock-chips.com>
diff --git a/configs/roc-pc-mezzanine-rk3399_defconfig b/configs/roc-pc-mezzanine-rk3399_defconfig
index ae16f35..8aa5a15 100644
--- a/configs/roc-pc-mezzanine-rk3399_defconfig
+++ b/configs/roc-pc-mezzanine-rk3399_defconfig
@@ -42,6 +42,7 @@
 CONFIG_MMC_DW_ROCKCHIP=y
 CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_ROCKCHIP=y
+CONFIG_SF_DEFAULT_BUS=1
 CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_DM_ETH=y
 CONFIG_ETH_DESIGNWARE=y