[PATCH] docs: devicetree: fix duplicated 'is is' in amlogic-dwmac and ti,dac7612

[Sanjay Suthar]

Hi all,

This patch fixes a minor grammatical issue by removing duplicated "is is" in
the Amlogic DWMAC and TI DAC7612 binding documentation files.

Please review.

Thanks and Regards,
Sanjay Suthar

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