Call up_irqinitialize from irq subsystem

Call up_irqinitialize from irq subsystem to make the irq ready for use as soon as possible

arch/x86/src/common/up_initialize.c

@@ -92,10 +92,6 @@ void up_initialize(void)
 
   up_addregion();
 
-  /* Initialize the interrupt subsystem */
-
-  up_irqinitialize();
-
   /* Initialize the system timer interrupt */
 
 #if !defined(CONFIG_SUPPRESS_INTERRUPTS) && !defined(CONFIG_SUPPRESS_TIMER_INTS)

arch/x86/src/common/up_internal.h

@@ -177,7 +177,6 @@ void x86_boardinitialize(void);
 void up_copystate(uint32_t *dest, uint32_t *src);
 void up_savestate(uint32_t *regs);
 void up_decodeirq(uint32_t *regs);
-void up_irqinitialize(void);
 #ifdef CONFIG_ARCH_DMA
 void weak_function up_dma_initialize(void);
 #endif