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>
diff --git a/arch/x86/cpu/queensbay/tnc.c b/arch/x86/cpu/queensbay/tnc.c
index de50893..c465642 100644
--- a/arch/x86/cpu/queensbay/tnc.c
+++ b/arch/x86/cpu/queensbay/tnc.c
@@ -80,7 +80,5 @@
 
 int arch_misc_init(void)
 {
-	pirq_init();
-
-	return 0;
+	return pirq_init();
 }