only full-size u-boot env on gfrg240.

gfrg240 does not have multiple size u-boot environment partitions,
and we don't have the alternate size definitions.

Change-Id: I8b2ea9d5cf3a327f79c51da7988ca9b779af6061
diff --git a/drivers/qtn/bootcfg/bootcfg_drv.c b/drivers/qtn/bootcfg/bootcfg_drv.c
index 11dc14f8..3dd94ff 100644
--- a/drivers/qtn/bootcfg/bootcfg_drv.c
+++ b/drivers/qtn/bootcfg/bootcfg_drv.c
@@ -208,8 +208,12 @@
 	int ret;
 	u32 crc;
 	int32_t idx = 0;
-	uint32_t env_size[] = {gBootCfgData.size, F64K_ENV_PARTITION_SIZE - sizeof(u32),
-				BOOT_CFG_BASE_SIZE - sizeof(u32)};
+	uint32_t env_size[] = {gBootCfgData.size,
+#ifndef GFRG240
+				F64K_ENV_PARTITION_SIZE - sizeof(u32),
+				BOOT_CFG_BASE_SIZE - sizeof(u32)
+#endif	/* ifndef GFRG240 */
+				};
 
 	ret = store_ops->read(store_ops, &gBootCfgData, gBootCfgData.size + sizeof(u32));
 	if (ret < 0 && ret != -ENODATA) {