[FS#744] Soekris net48xx hangs in GRUB when booting without serial connected

[LEDE Bugs]

The following task has a new comment added:

FS#744 - Soekris net48xx hangs in GRUB when booting without serial connected
User who did this - Russell Senior (russell)

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r408-g4ed8e57 (circa May 25, 2016) has the same problem
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=744#comment2529