The last quote directly attests to a close association between "wiccunga" and "galdorsangas". Two of the other quotes (2 & 5) also demonstrate that "galdrum" was placed in the same category of magical practices as Witchcraft.
Some of these sources might be as early as the 7th century Penitential of Theodore. I will update this post as soon as I can with more detailed information on the original sources.
Most, perhaps all, of these quotes are cited in the Bosworth-Toller Anglo-Saxon dictionary entries for wicce, wiccecræft, etc . The translations (and some of the original Old English texts) were found at the Heathen Thing blog: http://www.heathenthing.org/
"Ne sceal se cristena befrínan ða fúlan wiccan be his gesundfulnysse, þeáh ðe heó secgan cunne sum ðincg þurh deófol."Translation: "The christian must not inquire of the foul witch regarding his health, although she will be able to say some things on account of the devil”. (taken from here: http://www.heathenthing.org/blog/?p=271)
"Ne cristena man ðe his hǽlðe sécan wyle æt unálýfedum tilungum, oððe æt wyrigedum galdrum, oþþe æt ǽnigum wiccecræfte, ðonne bið hé ðám hǽðenum mannum gelíc"Translation: ”The Christian man who wants to seek his fortune with forbidden methods, either with magic spells or with any witchcraft, then he is equivalent to the heathen man.” (http://www.heathenthing.org/blog/?cat=8&paged=50)
"Wigliaþ stunte men menigfealde wigelunga on ðisum dæge æfter hǽðenum gewunan, swylce hí magon heora líf gelengan, oþþe heora gesundfulnysse"Translation: "On this day foolish men magic manifold magickings after the heathen fashion, as if they can lengthen their lives, or their healths” (http://www.heathenthing.org/blog/?m=200806)
"ðonne man tó wiccan and tó wigleran tilunge séce æt ǽnigre néode–"Translation: "when someone seeks attention from witches and magicians in any need” (http://www.heathenthing.org/blog/?m=200806)
"hǽlðe sécan æt unálýfedum tilungum oððe æt wyrigedum galdrum, oþþe æt ǽnigum wiccecræfte"Translation: "to seek benefits from unsanctioned actions or accursed sorcery, or any witchcraft" (http://www.heathenthing.org/blog/?m=200806&paged=3)
"gif hwylc wíf wiccunga begá and þá déoflican galdorsangas"Translation: ”if any woman should practice witchcraft and the devilish galdor chants ...” [a fast of one year is prescribed] (http://www.heathenthing.org/blog/?cat=8&paged=52)