kern_ntptime.c: Port to RTEMS

Remove previous adjtime() implementation.

Update #2348.

spec/build/cpukit/librtemscpu.yml

@@ -983,7 +983,6 @@ source:
 - cpukit/libtrace/record/record-util.c
 - cpukit/libtrace/record/record.c
 - cpukit/posix/src/_execve.c
-- cpukit/posix/src/adjtime.c
 - cpukit/posix/src/aio_suspend.c
 - cpukit/posix/src/barrierattrdestroy.c
 - cpukit/posix/src/barrierattrgetpshared.c
@@ -1424,6 +1423,7 @@ source:
 - cpukit/score/src/isrisinprogress.c
 - cpukit/score/src/isrvectortable.c
 - cpukit/score/src/iterateoverthreads.c
+- cpukit/score/src/kern_ntptime.c
 - cpukit/score/src/kern_tc.c
 - cpukit/score/src/libatomic.c
 - cpukit/score/src/log2table.c

spec/build/testsuites/sptests/grp.yml

@@ -337,6 +337,8 @@ links:
   uid: spmutex01
 - role: build-dependency
   uid: spnsext01
+- role: build-dependency
+  uid: spntp01
 - role: build-dependency
   uid: spobjgetnext
 - role: build-dependency

spec/build/testsuites/sptests/spntp01.yml

@@ -0,0 +1,19 @@
+SPDX-License-Identifier: CC-BY-SA-4.0 OR BSD-2-Clause
+build-type: test-program
+cflags: []
+copyrights:
+- Copyright (C) 2022 embedded brains GmbH (http://www.embedded-brains.de)
+cppflags: []
+cxxflags: []
+enabled-by: true
+features: c cprogram
+includes: []
+ldflags: []
+links: []
+source:
+- testsuites/sptests/spntp01/init.c
+stlib: []
+target: testsuites/sptests/spntp01.exe
+type: build
+use-after: []
+use-before: []