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/stm32mp25_defconfig b/configs/stm32mp25_defconfig
index 8423943..75f27c9 100644
--- a/configs/stm32mp25_defconfig
+++ b/configs/stm32mp25_defconfig
@@ -23,7 +23,6 @@
 CONFIG_CMD_CLK=y
 CONFIG_CMD_GPIO=y
 # CONFIG_CMD_LOADB is not set
-# CONFIG_CMD_NET is not set
 CONFIG_CMD_CACHE=y
 CONFIG_CMD_TIME=y
 CONFIG_CMD_RNG=y
@@ -31,6 +30,7 @@
 CONFIG_CMD_REGULATOR=y
 CONFIG_CMD_LOG=y
 CONFIG_OF_LIVE=y
+# CONFIG_NET is not set
 CONFIG_GPIO_HOG=y
 CONFIG_DM_I2C=y
 CONFIG_SYS_I2C_STM32F7=y