CONFIG_SPL_I2C is the wrong symbol to use here. It is the top-level
Kconfig symbol (not specific to either legacy or DM I2C), whereas the
i2c_init() function is specific to legacy I2C. This change fixes a
build failure when enabling SPL_I2C but not SPL_SYS_I2C_LEGACY.
Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Andre Przywara <andre.przywara@arm.com> Signed-by: Andre Przywara <andre.przywara@arm.com>