Net: m1600: Fix build err for hwmon.c.

    m1600-dirver inclusion
    category: bugfix
    bugzilla: https://gitee.com/openeuler/kernel/issues/I77UIM


    CVE: NA

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    M1600 dirver depend on CONFIG_HWMON, let's add the dependency.

    Signed-off-by: Yi Chen <open@nebula-matrix.com>