uboot-phytec

env_eeprom.c: Correct using saved environment

The changes in ed6a5d4 unintentionally broke support for reading the
environment saved to eeprom back.  To correct this the crc-check and
decision on which environment to use is now moved to env_relocate_spec.
This is done for both the "redundant env" and the "single env" case.

Signed-off-by: Ludger Dreier <ludger.dreier@keymile.com>