arch: cxd56xx: Fix IRQ request handling in cxd56_cpupause.c

Summary:
- During Wi-Fi audio streaming test, I noticed data corruption in tcb
- Finally, I found an issue in IRQ request handing with IPI
- This commit fixes this issue

Impact:
- Affects SMP only

Testing:
- Tested with spresense:wifi_smp

Signed-off-by: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>

arch/arm/src/cxd56xx/cxd56_cpupause.c

@@ -210,6 +210,13 @@ bool up_cpu_pausereq(int cpu)
 
 int up_cpu_paused(int cpu)
 {
+  /* Fistly, check if this IPI is to enable/disable IRQ */
+
+  if (handle_irqreq(cpu))
+    {
+      return OK;
+    }
+
   FAR struct tcb_s *tcb = this_task();
 
   /* Update scheduler parameters */
@@ -283,13 +290,6 @@ int arm_pause_handler(int irq, void *c, FAR void *arg)
 
   putreg32(0, CXD56_CPU_P2_INT + (4 * cpu));
 
-  /* Check if this IPI is to enable/disable IRQ */
-
-  if (handle_irqreq(cpu))
-    {
-      return OK;
-    }
-
   /* Check for false alarms.  Such false could occur as a consequence of
    * some deadlock breaking logic that might have already serviced the SG2
    * interrupt by calling up_cpu_paused.