package/python-pygame: replace PYTHON_VERSION_MAJOR

Replace PYTHON_VERSION_MAJOR by PYTHON3_VERSION_MAJOR now that python2
has been dropped

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/python-pygame/python-pygame.mk

@@ -103,7 +103,7 @@ PYTHON_PYGAME_POST_INSTALL_TARGET_HOOKS += PYTHON_PYGAME_REMOVE_TESTS
 
 ifneq ($(BR2_PACKAGE_PYTHON_PYGAME_EXAMPLES),y)
 define PYTHON_PYGAME_REMOVE_EXAMPLES
-	rm -rf $(TARGET_DIR)/usr/lib/python$(PYTHON_VERSION_MAJOR)/site-packages/pygame/examples
+	rm -rf $(TARGET_DIR)/usr/lib/python$(PYTHON3_VERSION_MAJOR)/site-packages/pygame/examples
 endef
 PYTHON_PYGAME_POST_INSTALL_TARGET_HOOKS += PYTHON_PYGAME_REMOVE_EXAMPLES
 endif