git: openjdk/jdk: 8306459: s390x: Replace NULL to nullptr

[Martin Doerr]

Changeset: 9c2e5b38
Author:    Amit Kumar <amitkumar at openjdk.org>
Committer: Martin Doerr <mdoerr at openjdk.org>
Date:      2023-04-20 12:28:26 +0000
URL:       https://git.openjdk.org/jdk/commit/9c2e5b387112606352b3150a5cc10ddec8d3afe9

8306459: s390x: Replace NULL to nullptr

Reviewed-by: mdoerr

! src/hotspot/cpu/s390/stubGenerator_s390.cpp
! src/hotspot/cpu/s390/templateTable_s390.cpp