rt-patches: update patch#68 for hardlockup detector

rt-patches: update patch#68 for hardlockup detector

After applying the patch enabling hardlockup detector
at https://git-master.nvidia.com/r/1934166, there is
a conflict when applying patch#68, like this:

patching file include/linux/printk.h
patching file kernel/printk/printk.c
patching file kernel/watchdog_hld.c
Hunk #1 FAILED at 19.
Hunk #2 succeeded at 198 (offset 94 lines).
Hunk #3 succeeded at 222 (offset 94 lines).
1 out of 3 hunks FAILED -- saving rejects to file
kernel/watchdog_hld.c.rej
make[1]: ***
[/home/buildbrain/Kary-kernel-only/tree/kernel-build/
make/Makefile.kernel:257:
/home/buildbrain/Kary-kernel-only/tree/out/
embedded_aarch64-arm64-tegra_gnu_linux_defconfig-v4m-rt_patches/
kernel/src-rt] Error 1

So this patch update the patch#68 to fix the conflict

Bug 200459527

Change-Id: I0e75e94e1f63170a54c5e73f2f0de89c1f40266a
Signed-off-by: Kary Jin <karyj@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/1940069
Reviewed-by: Daniel Fu <danifu@nvidia.com>
Reviewed-by: Sachin Nikam <snikam@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Bibek Basu <bbasu@nvidia.com>
Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>
Tested-by: mobile promotions <svcmobile_promotions@nvidia.com>