bsps: Remove gicvx_interrupt_dispatch()

Avoid one level of indirection.

Update #4202.

bsps/include/dev/irq/arm-gic-irq.h

@@ -110,12 +110,6 @@ void arm_interrupt_facility_set_exception_handler(void);
  */
 void arm_interrupt_handler_dispatch(rtems_vector_number vector);
 
-/**
- * This is the GICv1/GICv2/GICv3 interrupt dispatcher that is to be called from the
- * architecture-specific implementation of the IRQ handler.
- */
-void gicvx_interrupt_dispatch(void);
-
 uint32_t arm_gic_irq_processor_count(void);
 
 void arm_gic_irq_initialize_secondary_cpu(void);