common: Move CONFIG_SYS_DEF_EEPROM_ADDR out of common.h

This define seems better suited to the eeprom header file, particularly
as it is only used in the eeprom.c file.

Move it.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/eeprom.h b/include/eeprom.h
index 61eb826..79118eb 100644
--- a/include/eeprom.h
+++ b/include/eeprom.h
@@ -21,4 +21,8 @@
 #define eeprom_write(dev_addr, offset, buffer, cnt) ((void)-ENOSYS)
 #endif
 
+#if !defined(CONFIG_ENV_EEPROM_IS_ON_I2C) && defined(CONFIG_SYS_I2C_EEPROM_ADDR)
+# define CONFIG_SYS_DEF_EEPROM_ADDR CONFIG_SYS_I2C_EEPROM_ADDR
+#endif
+
 #endif