Convert CONFIG_SYS_I2C_EEPROM_ADDR et al to Kconfig

- Rename usages of CONFIG_SYS_DEF_EEPROM_ADDR to CONFIG_SYS_I2C_EEPROM_ADDR
  based on current usage.
- Convert CONFIG_SYS_I2C_EEPROM_ADDR, CONFIG_SYS_I2C_EEPROM_ADDR_LEN,
  CONFIG_SYS_I2C_EEPROM_BUS, CONFIG_CONFIG_SYS_EEPROM_SIZE
  CONFIG_SYS_EEPROM_PAGE_WRITE_BITS and CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
  to Kconfig.  We move these symbols around a bit and add appropriate
  dependencies to them.  In some cases, we now add a correct default value
  as well.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/cmd/i2c.c b/cmd/i2c.c
index c7c08c4..cbc8bd0 100644
--- a/cmd/i2c.c
+++ b/cmd/i2c.c
@@ -922,7 +922,7 @@
 				if (ret)
 					return i2c_report_err(ret,
 							      I2C_ERR_WRITE);
-#ifdef CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS
+#if CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS > 0
 				udelay(CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS * 1000);
 #endif
 				if (incrflag)