Merge tag 'i2c-bugfixes-for-v2020.10' of https://gitlab.denx.de/u-boot/custodians/u-boot-i2c

i2c bugfixes for v2020.10
- fix some issues with octeon_i2c driver on ARM Octeon TX2
- fix link failure with CONFIG_SPL and CONFIG_I2C_MUX_PCA954x