sandbox: Migrate CONFIG_I2C_EEPROM

Most users of CONFIG_I2C_EEPROM were migrated to defconfig a while ago,
but sandbox was skipped.  Leave it off for sandbox_spl where it does not
build, but does not need to be either.

Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 6a1874a..89ebe92 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -101,6 +101,7 @@
 CONFIG_PWRSEQ=y
 CONFIG_SPL_PWRSEQ=y
 CONFIG_SYSRESET=y
+CONFIG_I2C_EEPROM=y
 CONFIG_DM_MMC_OPS=y
 CONFIG_SANDBOX_MMC=y
 CONFIG_SPI_FLASH_SANDBOX=y