selftests/mm: prevent duplicate runs caused by TEST_GEN_PROGS

Commit 05f1eda ("selftests/mm: run all tests from run_vmtests.sh")
fixed the inconsistency caused by tests being defined as TEST_GEN_PROGS. 
This issue was leading to tests not being executed via run_vmtests.sh and
furthermore some tests running twice due to the kselftests wrapper also
executing them.

Fix the definition of two tests (soft-dirty and pagemap_ioctl) that are
still incorrectly defined.

Link: https://lkml.kernel.org/r/20231120222908.28559-1-npache@redhat.com
Signed-off-by: Nico Pache <npache@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Joel Savitz <jsavitz@redhat.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Author: PacheNico

tools/testing/selftests/mm/Makefile

@@ -60,7 +60,7 @@ TEST_GEN_FILES += mrelease_test
 TEST_GEN_FILES += mremap_dontunmap
 TEST_GEN_FILES += mremap_test
 TEST_GEN_FILES += on-fault-limit
-TEST_GEN_PROGS += pagemap_ioctl
+TEST_GEN_FILES += pagemap_ioctl
 TEST_GEN_FILES += thuge-gen
 TEST_GEN_FILES += transhuge-stress
 TEST_GEN_FILES += uffd-stress
@@ -72,7 +72,7 @@ TEST_GEN_FILES += mdwe_test
 TEST_GEN_FILES += hugetlb_fault_after_madv
 
 ifneq ($(ARCH),arm64)
-TEST_GEN_PROGS += soft-dirty
+TEST_GEN_FILES += soft-dirty
 endif
 
 ifeq ($(ARCH),x86_64)