Luiz Otavio O Souza 71462f5652 The RX_FREEBUFFER registers are a write to increment field.
Writing the full queue size to it every time was makeing it overflow with a
lot of bogus values.

This fixes the interrupt storms on irq 40.

Sponsored by:	Rubicon Communications, LLC (Netgate)
2016-12-01 02:35:15 +00:00
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