[FS#1496] can not enable /dev/mem by "make kernel_menuconfig"

[LEDE Bugs]

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FS#1496 - can not enable /dev/mem by "make kernel_menuconfig"
User who did this: Matthias Schiffer (NeoRaider)
Status: Unconfirmed -> Waiting on reporter

More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=1496