msm: ramdump: Add parent link to miscdevice

Set the parent of the miscdevice created in
create_ramdump_device() to be the platform device for each
processor. This allows us to easily locate ramdump devices for a
particular processor.

Change-Id: I7241e57231ad3f6a60d799be094d2b7a7fc40a3d
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
12 files changed