Convert CONFIG_CMD_EEPROM et al to Kconfig

This converts the following to Kconfig:
   CONFIG_CMD_EEPROM
   CONFIG_CMD_EEPROM_LAYOUT
   CONFIG_EEPROM_LAYOUT_HELP_STRING

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Tom Rini <trini@konsulko.com>
[trini: Rework Kconfig logic slightly, define EEPROM location on TI eval
platforms]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/tqma6dl_mba6_mmc_defconfig b/configs/tqma6dl_mba6_mmc_defconfig
index 6e4e6f7..cd31cf3 100644
--- a/configs/tqma6dl_mba6_mmc_defconfig
+++ b/configs/tqma6dl_mba6_mmc_defconfig
@@ -11,6 +11,7 @@
 CONFIG_HUSH_PARSER=y
 CONFIG_CMD_BOOTZ=y
 # CONFIG_CMD_IMLS is not set
+CONFIG_CMD_EEPROM=y
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_MMC=y
 CONFIG_CMD_SF=y