sync: p_mutex_init: bugfix pointer cast
sync: p_mutex_init: bugfix pointer cast

Signed-off-by: Haneef Mubarak <f9f947f657593d3a2bca6cebc070cafcafa25b61@gmail.com>

olajep/pal,aolofsson/pal,debug-de-su-ka/pal,aolofsson/pal,debug-de-su-ka/pal,aolofsson/pal,mateunho/pal,parallella/pal,mateunho/pal,eliteraspberries/pal,mateunho/pal,eliteraspberries/pal,olajep/pal,debug-de-su-ka/pal,mateunho/pal,parallella/pal,olajep/pal,parallella/pal,parallella/pal,parallella/pal,olajep/pal,debug-de-su-ka/pal,eliteraspberries/pal,eliteraspberries/pal,debug-de-su-ka/pal,mateunho/pal,aolofsson/pal,eliteraspberries/pal