siemens: Move CONFIG_SYS_I2C_EEPROM_ADDR usage out of CONFIG namespace

siemens: Move CONFIG_SYS_I2C_EEPROM_ADDR usage out of CONFIG namespace

The instances of CONFIG_SYS_I2C_EEPROM_ADDR on these platforms doesn't
match up with the rest of the EERPOM related defines in U-Boot.  Move
these out of the CONFIG namespace rather than make complex Kconfig
logic.

Cc: Samuel Egli <samuel.egli@siemens.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Heiko Schocher <hs@denx.de>
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Anatolij Gustschin <agust@denx.de>