Qt: Fix Linux build

src/duckstation-qt/inputbindingdialog.cpp

@@ -54,8 +54,7 @@ bool InputBindingDialog::eventFilter(QObject* watched, QEvent* event)
   else if (event_type == QEvent::MouseButtonPress || event_type == QEvent::MouseButtonDblClick)
   {
     // double clicks get triggered if we click bind, then click again quickly.
-    unsigned long button_index;
-    if (_BitScanForward(&button_index, static_cast<u32>(static_cast<const QMouseEvent*>(event)->button())))
+    unsigned button_index = CountTrailingZeros(static_cast<u32>(static_cast<const QMouseEvent*>(event)->button()));
     m_new_bindings.push_back(InputManager::MakePointerButtonKey(0, button_index));
     return true;
   }

src/duckstation-qt/inputbindingwidgets.cpp

@@ -111,8 +111,7 @@ bool InputBindingWidget::eventFilter(QObject* watched, QEvent* event)
   else if (event_type == QEvent::MouseButtonPress || event_type == QEvent::MouseButtonDblClick)
   {
     // double clicks get triggered if we click bind, then click again quickly.
-    unsigned long button_index;
-    if (_BitScanForward(&button_index, static_cast<u32>(static_cast<const QMouseEvent*>(event)->button())))
+    const u32 button_index = CountTrailingZeros(static_cast<u32>(static_cast<const QMouseEvent*>(event)->button()));
     m_new_bindings.push_back(InputManager::MakePointerButtonKey(0, button_index));
     return true;
   }

src/frontend-common/sdl_input_source.cpp

@@ -3,6 +3,7 @@
 
 #include "sdl_input_source.h"
 #include "common/assert.h"
+#include "common/bitutils.h"
 #include "common/log.h"
 #include "common/string_util.h"
 #include "core/host.h"
@@ -718,8 +719,7 @@ bool SDLInputSource::HandleJoystickHatEvent(const SDL_JoyHatEvent* ev)
   unsigned long changed_direction = last_direction ^ ev->value;
   while (changed_direction != 0)
   {
-    unsigned long pos;
-    _BitScanForward(&pos, changed_direction);
+    const u32 pos = CountTrailingZeros(changed_direction);
 
     const unsigned long mask = (1u << pos);
     changed_direction &= ~mask;