x86: Allow pirq_init() to return an error

This function can fail. In this case we should return the error rather than
swallowing it.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

arch/x86/cpu/qemu/qemu.c

@@ -41,7 +41,5 @@ void reset_cpu(ulong addr)
 
 int arch_misc_init(void)
 {
-	pirq_init();
-
-	return 0;
+	return pirq_init();
 }