Merge tag '20210928-for-next' of https://source.denx.de/u-boot/custodians/u-boot-i2c into next

i2c changes for 20210928-for-next

- i2c: rcar_i2c: Enable configuring SCL rise and fall times
- i2c: mvtwsi: Add support for DM clocks and resets
- mtd: nand: raw: convert nand_dt_init() to ofnode_xx() interface