Documentation: networking: device drivers: Remove stray asterisks

Documentation: networking: device drivers: Remove stray asterisks

These asterisks were once references to a line that said:
  "* Other names and brands may be claimed as the property of others."
But now, they serve no purpose; they can only irritate the reader.

Fixes: c3c0ca653b39 ("e1000: update README for e1000")
Fixes: 481e28024c84 ("e100.txt: Cleanup license info in kernel doc")
Fixes: c31d7b80052e ("e1000e.txt: Add e1000e documentation")
Fixes: f595f8986dfd ("Documentation: fm10k: Add kernel documentation")
Fixes: cda7ed94ee4e ("igb.txt: Add igb documentation")
Fixes: 3e696ba4e222 ("igbvf.txt: Add igbvf Documentation")
Fixes: a8d43fc25ce8 ("Documentation/networking/: Update Intel wired LAN driver documentation")
Fixes: e14bc305527e ("ixgbevf.txt: Update ixgbevf documentation")
Fixes: 70cf9978a383 ("Documentation: i40e: Prepare documentation for RST conversion")
Fixes: 11f8b99c9974 ("i40evf: add driver to kernel build system")
Fixes: 934bc8b90753 ("Documentation: ice: Prepare documentation for RST conversion")
Fixes: 8dce456e1bc6 ("ionic: Add basic framework for IONIC Network device driver")
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>