McuSupport: Make hardcoded target list "semi data-driven"

This change pushes the hard-coded list a bit towards a "data-driven"
approach. That way, the planned switch to the .json files based apporach
(see UL-2012) becomes less of a change.

Some target entries are added to match the current target list in Qt
for MCUs packages.

If we don't manage to get the .json-based target listing in place, this
could even serve as fall-back.

Task-number: UL-2012
Change-Id: If39e5d581ac19468b6f52ed221ec2d39bfab9f80
Reviewed-by: hjk <hjk@qt.io>
Reviewed-by: Marco Bubke <marco.bubke@qt.io>

src/plugins/mcusupport/mcusupportsdk.h

@@ -37,7 +37,7 @@ namespace Sdk {
 McuPackage *createQtForMCUsPackage();
 
 // Legacy: List of targets supported by Qt for MCUs 1.0
-void hardcodedTargetsAndPackages(const McuPackage* const qtForMCUsSdkPackage,
+void hardcodedTargetsAndPackages(const Utils::FilePath &qulDir,
                                  QVector<McuPackage*> *packages, QVector<McuTarget*> *mcuTargets);
 
 } // namespace Sdk