board: gateworks: venice: add fixup for GW73xx-C+

The GW73xx-C revision and onward replaced the 5-port PCIe switch with a
4-port (dropping PCIe to one of the miniPCIe sockets) due to part
availability. This moved the PCI bus of the GbE eth1 device. Use a fixup
to adjust the dt accordingly so that local-mac-address assigned from dt
works on new revision boards.

While we are at it, rename 'blob' to 'fdt' for clarity.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
diff --git a/board/gateworks/venice/eeprom.c b/board/gateworks/venice/eeprom.c
index 7a46f44..ac52cc0 100644
--- a/board/gateworks/venice/eeprom.c
+++ b/board/gateworks/venice/eeprom.c
@@ -20,6 +20,7 @@
 struct venice_board_info som_info;
 struct venice_board_info base_info;
 char venice_model[32];
+char venice_baseboard_model[32];
 u32 venice_serial;
 
 /* return a mac address from EEPROM info */
@@ -321,6 +322,7 @@
 			base_info.model[3], /* baseboard */
 			base_info.model[4], base_info.model[5], /* subload of baseboard */
 			som_info.model[4], som_info.model[5]); /* last 2digits of SOM */
+		strlcpy(venice_baseboard_model, base_info.model, sizeof(venice_baseboard_model));
 
 		/* baseboard revision */
 		rev_pcb = get_pcb_rev(base_info.model);
@@ -357,6 +359,11 @@
 	return venice_model;
 }
 
+const char *eeprom_get_baseboard_model(void)
+{
+	return venice_baseboard_model;
+}
+
 u32 eeprom_get_serial(void)
 {
 	return venice_serial;