boards: mikroe: clicker_ra4m1: Choose the icu to `zephyr,interrupt-co…

…ntroller`

Set ICU to interrupt-controller in the chosen section to reflect the
INTERRUPT ID setting in the ISR table.

Signed-off-by: TOKITA Hiroshi <tokita.hiroshi@gmail.com>

boards/mikroe/clicker_ra4m1/mikroe_clicker_ra4m1.dts

@@ -19,6 +19,7 @@
  zephyr,shell-uart = &uart0;
  zephyr,sram = &sram0;
  zephyr,flash = &flash0;
+ zephyr,interrupt-controller = &icu;
  };
 
  leds {