Fix build on older MinGW versions

> In constructor 'QWindowsPrintDevice::QWindowsPrintDevice(const QString&)':
> src\plugins\printsupport\windows\qwindowsprintdevice.cpp:105:86:
> error: 'DC_COLLATE' was not declared in this scope

Change-Id: Ifb64c323765ae4b6abb80c32d4ba2bc3fbffa245
Reviewed-by: John Layt <jlayt@kde.org>
AVX image code was removed

Remove a last left-over after 5e519b31dceff1fbb0a7ac5eeb5f6e071c1b6ef7

Change-Id: I85e73a5d81d45b4ccfc80cdaf34ab7b6c3c85bdc
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>