Add lpi2c driver for i.MX7ULP. Need to enable the two options to use this driver: CONFIG_DM_I2C=y CONFIG_SYS_I2C_IMX_LPI2C=y Signed-off-by: Peng Fan <peng.fan@nxp.com> Acked-by: Heiko Schocher <hs@denx.de> Cc: Stefano Babic <sbabic@denx.de>