With the introduction of mlx5 firmware flash support, we get a link
error with CONFIG_MLXFW=m and CONFIG_MLX5_CORE=y:

drivers/net/ethernet/mellanox/mlx5/core/fw.o: In function `mlx5_firmware_flash':
fw.c:(.text+0x9d4): undefined reference to `mlxfw_firmware_flash'

We could have a more elaborate method to force MLX5 to be a loadable
module in this case, but the easiest fix seems to be to always enable
MLXFW as well, like we do for CONFIG_MLXSW_SPECTRUM, which is the other
user of mlxfw_firmware_flash.

Fixes: 3ffaabecd1a1 ("net/mlx5e: Support the flash device ethtool callback")
Signed-off-by: Arnd Bergmann <redacted>
---
 drivers/net/ethernet/mellanox/mlx5/core/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/Kconfig b/drivers/net/ethernet/mellanox/mlx5/core/Kconfig
index cf1ef48bfd8d..09edee060b03 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/Kconfig
+++ b/drivers/net/ethernet/mellanox/mlx5/core/Kconfig

@@ -6,6 +6,7 @@ config MLX5_CORE
 	tristate "Mellanox Technologies ConnectX-4 and Connect-IB core driver"
 	depends on MAY_USE_DEVLINK
 	depends on PCI
+	select MLXFW
 	default n
 	---help---
 	  Core driver for low level functionality of the ConnectX-4 and

-- 
2.9.0

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