If subsystem restart (SSR) is in progress and the line discipline is removed, then the platform devices may get removed twice leading to a kernel panic. Add conditional logic to properly handle platform device removal if line discipline is removed while a subsystem restart is in progress. CRs-Fixed: 386491 Change-Id: I1ddc89175509e333098f849b0f76e09660644573 Signed-off-by: Eric Holmberg <eholmber@codeaurora.org>