ANDROID: GKI: add devm_register_sys_off_handler to db845c symbol list.

In commit 3e79182c ("pinctrl: qcom: switch to
devm_register_sys_off_handler()"), pinpinctrl-msm module was moved to
use devm_register_sys_off_handler which is needed by the db845c target,
so add the symbol to that target to fix the build.

Fixes: 3e79182c ("pinctrl: qcom: switch to devm_register_sys_off_handler()")
Change-Id: I56f03e371581e2576091adde071205ae65e11df0
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>