Convert CONFIG_SYS_I2C_EEPROM_ADDR_LEN to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_I2C_EEPROM_ADDR_LEN

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/km/km-mpc832x.h b/include/configs/km/km-mpc832x.h
index aac1e99..888bb29 100644
--- a/include/configs/km/km-mpc832x.h
+++ b/include/configs/km/km-mpc832x.h
@@ -58,6 +58,3 @@
 
 #define CONFIG_SYS_KMBEC_FPGA_BASE	0xE8000000
 #define CONFIG_SYS_KMBEC_FPGA_SIZE	128
-
-/* EEprom support */
-#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN	1