tm-trap from powerpc in ubuntu_kernel_selftests failed on P8 with 5.4

[Po-Hsu Lin]

Issue found on F-5.4 and B-5.4 with P8 node modoc

Test failed with:
 # selftests: powerpc/tm: tm-trap
 # test: tm_trap_test
 # tags: git_version:unknown
 # Little-Endian machine detected. Checking if endianness flips inadvertently on trap in TM... ./tm-trap:tm-trap.c:302: pthread_create(): Invalid argument
 # failure: tm_trap_test
 not ok 11 selftests: powerpc/tm: tm-trap # exit=1

This issue can be found on 5.4.0-48.52 as well.

[Po-Hsu Lin (cypressyew)]

Found F-5.8 P8 as well.