spmi: pmic-arb: Remove custom show_resume_irq code

The generic irq layer supports showing the resume irq via
/sys/power/pm_wakeup_irq as of commit a6f5f0dd4e21 ("PM / sleep:
Report interrupt that caused system wakeup"). Remove the custom
code here that duplicates that code.

Change-Id: Ic955890cf5d80743429f908a2be7489b4d84b15e
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
diff --git a/include/linux/spmi.h b/include/linux/spmi.h
index 319c52a2..7725dd7 100644
--- a/include/linux/spmi.h
+++ b/include/linux/spmi.h
@@ -1,4 +1,4 @@
-/* Copyright (c) 2012-2016, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2012-2017, The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -171,19 +171,6 @@
 	module_driver(__spmi_driver, spmi_driver_register, \
 			spmi_driver_unregister)
 
-#ifdef CONFIG_QCOM_SHOW_RESUME_IRQ
-extern int msm_show_resume_irq_mask;
-static inline bool spmi_show_resume_irq(void)
-{
-	return msm_show_resume_irq_mask;
-}
-#else
-static inline bool spmi_show_resume_irq(void)
-{
-	return false;
-}
-#endif
-
 int spmi_register_read(struct spmi_device *sdev, u8 addr, u8 *buf);
 int spmi_ext_register_read(struct spmi_device *sdev, u8 addr, u8 *buf,
 			   size_t len);