board: gateworks: venice: use common GSC driver

Use the common GSC driver.

This allows us to do some additional cleanup:
 - rename gsc{.c,.h} to eeprom{.c.h} for clarity
 - collapse eeprom_get_dev
 - remove unnecessary header files and alphabatize includes

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/configs/imx8mn_venice_defconfig b/configs/imx8mn_venice_defconfig
index 41898da..afb9c5c 100644
--- a/configs/imx8mn_venice_defconfig
+++ b/configs/imx8mn_venice_defconfig
@@ -13,6 +13,7 @@
 CONFIG_TARGET_IMX8MN_VENICE=y
 CONFIG_SPL_MMC=y
 CONFIG_SPL_SERIAL=y
+CONFIG_SPL_DRIVERS_MISC=y
 CONFIG_SPL=y
 CONFIG_ENV_OFFSET_REDUND=0xff8000
 CONFIG_SPL_IMX_ROMAPI_LOADADDR=0x48000000