boards: Disable NET on platforms without NETDEVICES

None of these platforms enabled a networking devices, and disabled
CMD_NET. Given that we used to gate network support on CMD_NET rather
than NET, we disable CONFIG_NET on these platforms now.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/imx6q_bosch_acc_defconfig b/configs/imx6q_bosch_acc_defconfig
index 05bab03..6abb795 100644
--- a/configs/imx6q_bosch_acc_defconfig
+++ b/configs/imx6q_bosch_acc_defconfig
@@ -63,7 +63,6 @@
 # CONFIG_CMD_ITEST is not set
 # CONFIG_CMD_SOURCE is not set
 # CONFIG_CMD_SETEXPR is not set
-# CONFIG_CMD_NET is not set
 # CONFIG_CMD_BLOCK_CACHE is not set
 # CONFIG_CMD_SLEEP is not set
 # CONFIG_CMD_MP is not set
@@ -82,7 +81,7 @@
 CONFIG_ENV_WRITEABLE_LIST=y
 CONFIG_ENV_ACCESS_IGNORE_FORCE=y
 CONFIG_VERSION_VARIABLE=y
-CONFIG_TFTP_BLOCKSIZE=512
+# CONFIG_NET is not set
 CONFIG_SPL_DM=y
 CONFIG_BOOTCOUNT_LIMIT=y
 CONFIG_DM_BOOTCOUNT=y