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/board/gateworks/venice/Makefile b/board/gateworks/venice/Makefile
index b8b53fd..fbb716e 100644
--- a/board/gateworks/venice/Makefile
+++ b/board/gateworks/venice/Makefile
@@ -4,7 +4,7 @@
 # SPDX-License-Identifier: GPL-2.0+
 #
 
-obj-y += venice.o gsc.o
+obj-y += venice.o eeprom.o
 
 ifdef CONFIG_SPL_BUILD
 obj-y += spl.o