imx9_boot.c: Add initialization of pin interrupts

Initialize the pin interrupt support during boot

arch/arm64/src/imx9/imx9_boot.c

@@ -37,8 +37,10 @@
 #include "arm64_arch.h"
 #include "arm64_internal.h"
 #include "arm64_mmu.h"
+
 #include "imx9_boot.h"
 #include "imx9_serial.h"
+#include "imx9_gpio.h"
 #include "imx9_lowputc.h"
 
 /****************************************************************************
@@ -103,6 +105,12 @@ void arm64_chip_boot(void)
   imx9_lowsetup();
 #endif
 
+  /* Initialize pin interrupt support */
+
+#ifdef CONFIG_IMX9_GPIO_IRQ
+  imx9_gpioirq_initialize();
+#endif
+
   /* Perform board-specific device initialization. This would include
    * configuration of board specific resources such as GPIOs, LEDs, etc.
    */