Convert CONFIG_DEFAULT_SPI_* to Kconfig

This converts the following to Kconfig:
   CONFIG_DEFAULT_SPI_BUS
   CONFIG_DEFAULT_SPI_MODE

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/configs/bg0900_defconfig b/configs/bg0900_defconfig
index a8b5f86..2c4d3e3 100644
--- a/configs/bg0900_defconfig
+++ b/configs/bg0900_defconfig
@@ -23,6 +23,7 @@
 CONFIG_CMD_NAND_TRIMFFS=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_SPI=y
+CONFIG_DEFAULT_SPI_BUS=2
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y
 CONFIG_CMD_PING=y
diff --git a/configs/ls1012aqds_qspi_defconfig b/configs/ls1012aqds_qspi_defconfig
index 1bf9343..d2c3eea 100644
--- a/configs/ls1012aqds_qspi_defconfig
+++ b/configs/ls1012aqds_qspi_defconfig
@@ -27,7 +27,10 @@
 CONFIG_CMD_MMC=y
 CONFIG_CMD_PCI=y
 CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
+CONFIG_DEFAULT_SPI_BUS=1
 CONFIG_CMD_USB=y
+CONFIG_DEFAULT_SPI_BUS=1
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_CACHE=y
 CONFIG_CMD_DATE=y
diff --git a/configs/ls1012aqds_tfa_SECURE_BOOT_defconfig b/configs/ls1012aqds_tfa_SECURE_BOOT_defconfig
index 747fa3d..9a6139e 100644
--- a/configs/ls1012aqds_tfa_SECURE_BOOT_defconfig
+++ b/configs/ls1012aqds_tfa_SECURE_BOOT_defconfig
@@ -27,6 +27,8 @@
 CONFIG_CMD_MMC=y
 CONFIG_CMD_PCI=y
 CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
+CONFIG_DEFAULT_SPI_BUS=1
 CONFIG_CMD_USB=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_CACHE=y
diff --git a/configs/ls1012aqds_tfa_defconfig b/configs/ls1012aqds_tfa_defconfig
index a41757d..d18d40a 100644
--- a/configs/ls1012aqds_tfa_defconfig
+++ b/configs/ls1012aqds_tfa_defconfig
@@ -27,6 +27,8 @@
 CONFIG_CMD_MMC=y
 CONFIG_CMD_PCI=y
 CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
+CONFIG_DEFAULT_SPI_BUS=1
 CONFIG_CMD_USB=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_CACHE=y
diff --git a/configs/mx28evk_auart_console_defconfig b/configs/mx28evk_auart_console_defconfig
index beb10c4..c54b933 100644
--- a/configs/mx28evk_auart_console_defconfig
+++ b/configs/mx28evk_auart_console_defconfig
@@ -23,6 +23,7 @@
 CONFIG_CMD_NAND_TRIMFFS=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_SPI=y
+CONFIG_DEFAULT_SPI_BUS=2
 CONFIG_CMD_USB=y
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y
diff --git a/configs/mx28evk_defconfig b/configs/mx28evk_defconfig
index be1feb3..187467d 100644
--- a/configs/mx28evk_defconfig
+++ b/configs/mx28evk_defconfig
@@ -23,6 +23,7 @@
 CONFIG_CMD_NAND_TRIMFFS=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_SPI=y
+CONFIG_DEFAULT_SPI_BUS=2
 CONFIG_CMD_USB=y
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y
diff --git a/configs/mx28evk_nand_defconfig b/configs/mx28evk_nand_defconfig
index 61e3586..7d891e7 100644
--- a/configs/mx28evk_nand_defconfig
+++ b/configs/mx28evk_nand_defconfig
@@ -22,6 +22,7 @@
 CONFIG_CMD_NAND_TRIMFFS=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_SPI=y
+CONFIG_DEFAULT_SPI_BUS=2
 CONFIG_CMD_USB=y
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y
diff --git a/configs/mx28evk_spi_defconfig b/configs/mx28evk_spi_defconfig
index 3198baf..cb5b1b3 100644
--- a/configs/mx28evk_spi_defconfig
+++ b/configs/mx28evk_spi_defconfig
@@ -22,6 +22,7 @@
 CONFIG_CMD_NAND_TRIMFFS=y
 CONFIG_CMD_SF=y
 CONFIG_CMD_SPI=y
+CONFIG_DEFAULT_SPI_BUS=2
 CONFIG_CMD_USB=y
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y
diff --git a/configs/mx31pdk_defconfig b/configs/mx31pdk_defconfig
index c6dcb45..2267818 100644
--- a/configs/mx31pdk_defconfig
+++ b/configs/mx31pdk_defconfig
@@ -13,6 +13,8 @@
 # CONFIG_AUTO_COMPLETE is not set
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_SPI=y
+CONFIG_DEFAULT_SPI_BUS=1
+CONFIG_DEFAULT_SPI_MODE=4
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_MII=y