devices-7k: Fix section mismatches

WARNING: vmlinux.o(.text+0x9942c): Section mismatch in reference
from the function msm_pm_register_irqs() to the function
.init.text:msm_pm_set_irq_extns()
The function msm_pm_register_irqs() references
the function __init msm_pm_set_irq_extns().
This is often because msm_pm_register_irqs lacks a __init
annotation or the annotation of msm_pm_set_irq_extns is wrong.

Change-Id: Ibdd1a12fb01feca916005ad2082764174023ceb8
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>