bugfixes-for-v2020.07-rc4

Heiko Schocher

@hs

b24dc83f · misc: i2c_eeprom: implement different probe test eeprom offset · May 28, 2020

i2c changes for v2020.07-rc4
- fix eeprom issue with AT24MAC402 (address != 0)
- fix in i2c-uclass.c when compiling compiling with -Wtype-limits
- designware_i2c: small fixes:
  - check if the device is powered
  - tidy up use of NULL priv