wiseconnect: Fix use of configTICK_RATE_HZ

configTICK_RATE_HZ is specific to Wiseconnect. Equivalent in Zephyr is
CONFIG_SYS_CLOCK_TICKS_PER_SEC.

Note usually, configTICK_RATE_HZ == 1000 while
CONFIG_SYS_CLOCK_TICKS_PER_SEC == 1024.

Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>

wiseconnect/components/device/silabs/si91x/wireless/ahb_interface/src/sl_platform.c

@@ -62,7 +62,7 @@ void sli_si91x_platform_init(void)
   DWT->CTRL |= 0x1;
 
 #if (configUSE_TICKLESS_IDLE == 0)
-  SysTick_Config(SystemCoreClock / configTICK_RATE_HZ);
+  SysTick_Config(SystemCoreClock / CONFIG_SYS_CLOCK_TICKS_PER_SEC);
   // Set P2P Intr priority
   NVIC_SetPriority(SysTick_IRQn, SYSTICK_INTR_PRI);
 #endif