kernel/msm: tz: Add msm_device_tz_log device

msm_devcie_tz_log is a debugfs module that displays
the contents of a buffer located in IMEM. The contents
of this hold diagnostic information logged in by modules
running on secure domain.
This patch enables this tz_log debugfs module for 8974
target device by setting CONFIG_MSM_TZ_LOG

Change-Id: If3cdee4da6febb539516595dfcd50e69f0940ee4
Signed-off-by: Hariprasad Dhalinarasimha <hnamgund@codeaurora.org>
diff --git a/arch/arm/mach-msm/devices.h b/arch/arm/mach-msm/devices.h
index d01a229..d476ca6 100644
--- a/arch/arm/mach-msm/devices.h
+++ b/arch/arm/mach-msm/devices.h
@@ -396,3 +396,5 @@
 extern struct platform_device apq8064_rtb_device;
 
 extern struct platform_device msm8960_cache_dump_device;
+
+extern struct platform_device apq_device_tz_log;