QtGui: Fix duplication of logging category lcQpaFonts

Move it to qplatformfontdatabase.h.

Upstream commit:
 - Qt 6.0: ab01885e48873fb2ad71841a3f1627fe4d9cd835

--- a/qtbase/src/gui/text/qplatformfontdatabase.cpp
+++ b/qtbase/src/gui/text/qplatformfontdatabase.cpp
@@ -52,6 +52,8 @@
 
 QT_BEGIN_NAMESPACE
 
+Q_LOGGING_CATEGORY(lcQpaFonts, "qt.qpa.fonts")
+
 void qt_registerFont(const QString &familyname, const QString &stylename,
                      const QString &foundryname, int weight,
                      QFont::Style style, int stretch, bool antialiased,

--- a/qtbase/src/gui/text/qplatformfontdatabase.h
+++ b/qtbase/src/gui/text/qplatformfontdatabase.h
@@ -50,6 +50,7 @@
 //
 
 #include <QtGui/qtguiglobal.h>
+#include <QtCore/qloggingcategory.h>
 #include <QtCore/QString>
 #include <QtCore/QStringList>
 #include <QtCore/QList>
@@ -62,6 +63,7 @@
 
 QT_BEGIN_NAMESPACE
 
+Q_DECLARE_LOGGING_CATEGORY(lcQpaFonts)
 
 class QWritingSystemsPrivate;
 

--- a/qtbase/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
+++ b/qtbase/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
@@ -86,8 +86,6 @@
 
 QT_BEGIN_NAMESPACE
 
-Q_LOGGING_CATEGORY(lcQpaFonts, "qt.qpa.fonts")
-
 static float SYNTHETIC_ITALIC_SKEW = std::tan(14.f * std::acos(0.f) / 90.f);
 
 bool QCoreTextFontEngine::ct_getSfntTable(void *user_data, uint tag, uchar *buffer, uint *length)

--- a/qtbase/src/platformsupport/fontdatabases/mac/qfontengine_coretext_p.h
+++ b/qtbase/src/platformsupport/fontdatabases/mac/qfontengine_coretext_p.h
@@ -64,8 +64,6 @@
 
 QT_BEGIN_NAMESPACE
 
-Q_DECLARE_LOGGING_CATEGORY(lcQpaFonts)
-
 class QCoreTextFontEngine : public QFontEngine
 {
     Q_GADGET

--- a/qtbase/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase.cpp
+++ b/qtbase/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase.cpp
@@ -68,8 +68,6 @@
 
 QT_BEGIN_NAMESPACE
 
-Q_LOGGING_CATEGORY(lcQpaFonts, "qt.qpa.fonts")
-
 #ifndef QT_NO_DIRECTWRITE
 // ### fixme: Consider direct linking of dwrite.dll once Windows Vista pre SP2 is dropped (QTBUG-49711)
 

--- a/qtbase/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase_p.h
+++ b/qtbase/src/platformsupport/fontdatabases/windows/qwindowsfontdatabase_p.h
@@ -63,8 +63,6 @@
 
 QT_BEGIN_NAMESPACE
 
-Q_DECLARE_LOGGING_CATEGORY(lcQpaFonts)
-
 class QWindowsFontEngineData
 {
     Q_DISABLE_COPY_MOVE(QWindowsFontEngineData)

--- a/qtbase/src/platformsupport/themes/genericunix/qgenericunixthemes.cpp
+++ b/qtbase/src/platformsupport/themes/genericunix/qgenericunixthemes.cpp
@@ -40,6 +40,7 @@
 #include "qgenericunixthemes_p.h"
 
 #include "qpa/qplatformtheme_p.h"
+#include "qpa/qplatformfontdatabase.h"
 
 #include <QtGui/QPalette>
 #include <QtGui/QFont>
@@ -76,7 +77,6 @@
 QT_BEGIN_NAMESPACE
 
 Q_DECLARE_LOGGING_CATEGORY(qLcTray)
-Q_LOGGING_CATEGORY(lcQpaFonts, "qt.qpa.fonts")
 
 ResourceHelper::ResourceHelper()
 {