cmd_eeprom: fix i2c_{read|write} usage if env is in I2C EEPROM

Data "offset" is not used directly in case of I2C EEPROM. Istead it is
split into "block number" and "offset within mentioned block". Which are
"addr[0]" and "addr[1]" respectively.

Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Heiko Schocher <hs@denx.de>
Cc: Wolfgang Denk <wd@denx.de>
Cc: Stefan Roese <sr@denx.de>
Cc: Mischa Jonker <mjonker@synopsys.com>

common/cmd_eeprom.c

@@ -161,7 +161,7 @@ int eeprom_read (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cnt
 #if defined(CONFIG_SPI) && !defined(CONFIG_ENV_EEPROM_IS_ON_I2C)
 		spi_read (addr, alen, buffer, len);
 #else
-		if (i2c_read (addr[0], offset, alen-1, buffer, len) != 0)
+		if (i2c_read (addr[0], addr[1], alen-1, buffer, len) != 0)
 			rcode = 1;
 #endif
 		buffer += len;
@@ -339,7 +339,7 @@ int eeprom_write (unsigned dev_addr, unsigned offset, uchar *buffer, unsigned cn
 		/* Write is enabled ... now write eeprom value.
 		 */
 #endif
-		if (i2c_write (addr[0], offset, alen-1, buffer, len) != 0)
+		if (i2c_write (addr[0], addr[1], alen-1, buffer, len) != 0)
 			rcode = 1;
 
 #endif