tricorder: rewrite tricordereeprom command

This rewrite uses lately promoted eeprom_init(int) function to choose the
right I2C bus when writing data to the EEPROM.

Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
Cc: Marek Vasut <marex@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
Cc: Heiko Schocher <hs@denx.de>
Reviewed-by: Heiko Schocher <hs@denx.de>