Convert CONFIG_I2C_SET_DEFAULT_BUS_NUM et al to Kconfig

This converts the following to Kconfig:
   CONFIG_I2C_SET_DEFAULT_BUS_NUM
   CONFIG_I2C_DEFAULT_BUS_NUMBER

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/ls1046afrwy_tfa_defconfig b/configs/ls1046afrwy_tfa_defconfig
index 9b45236..b6964a7 100644
--- a/configs/ls1046afrwy_tfa_defconfig
+++ b/configs/ls1046afrwy_tfa_defconfig
@@ -40,6 +40,7 @@
 CONFIG_SATA_CEVA=y
 CONFIG_FSL_CAAM=y
 CONFIG_DM_I2C=y
+CONFIG_I2C_SET_DEFAULT_BUS_NUM=y
 CONFIG_SYS_I2C_EEPROM_ADDR=0x52
 CONFIG_FSL_ESDHC=y
 CONFIG_MTD=y