python-pyqt: use 'depends on' rather than 'select' for Qt

When pyqt is used it's obvious that qt needs to be selected and
configured by the user, hence we enforce it by making pyqt depending on
qt, rather than selecting it and depending only on the qt requirements.

Signed-off-by: Andreas Naumann <anaumann@ultratronik.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/python-pyqt/Config.in

@@ -1,13 +1,9 @@
-comment "python-pyqt needs a toolchain w/ C++, threads"
-	depends on BR2_USE_MMU
-	depends on !BR2_INSTALL_LIBSTDCPP || !BR2_TOOLCHAIN_HAS_THREADS
+comment "python-pyqt needs Qt4"
+	depends on !BR2_PACKAGE_QT
 
 config BR2_PACKAGE_PYTHON_PYQT
 	bool "python-pyqt"
-	depends on BR2_INSTALL_LIBSTDCPP
-	depends on BR2_TOOLCHAIN_HAS_THREADS # qt
-	depends on BR2_USE_MMU # qt
-	select BR2_PACKAGE_QT
+	depends on BR2_PACKAGE_QT
 	select BR2_PACKAGE_PYTHON_SIP
 	help
 	  PyQt4 for Qt Embedded 4 bindings.