Avoid Nearest mipmap filtering for BorderImage.
Avoid Nearest mipmap filtering for BorderImage.

QSGOpaqueTextureMaterial has Nearest as the default mipmap
filtering, which BorderImage inherited. That default value is
not ideal, but I would prefer to not change behavior, so
request None from borderimage instead.

Change-Id: I9857f1434ae9f067c3b0e460ea552d3e854b9d64
Reviewed-by: aavit <7b3193bdca3a57b9140f9c882d4fe8f629e8932f@digia.com>

mgrunditz/qtdeclarative-2d,qmlc/qtdeclarative,mgrunditz/qtdeclarative-2d,qmlc/qtdeclarative,qmlc/qtdeclarative,qmlc/qtdeclarative,mgrunditz/qtdeclarative-2d,mgrunditz/qtdeclarative-2d,mgrunditz/qtdeclarative-2d,qmlc/qtdeclarative,qmlc/qtdeclarative,qmlc/qtdeclarative,mgrunditz/qtdeclarative-2d,mgrunditz/qtdeclarative-2d,qmlc/qtdeclarative