float-h: port to C23 PowerPC GCC * lib/float.in.h (LDBL_MAX) [__LDBL_NORM_MAX__]: Do not override, as GCC versions defining __LDBL_NORM_MAX__ surely have LDBL_MAX right. (LDBL_NORM_MAX): Prefer __LDBL_NORM_MAX__ if defined. Otherwise, hardcode PowerPC value if applicable. * tests/test-float-h.c (normalize_long_double): Fix typo that broke this function when given large numbers. (test_long_double): Normalize LDBL_MAX before comparing it to LDBL_NORM_MAX.