bitmap: align test_bitmap output

bitmap: align test_bitmap output

Different subtests print output in slightly different formats. Unify the
format for better visual representation.

The test output before:

[    0.553474] test_bitmap: parselist: 14: input is '0-2047:128/256' OK, Time: 202
[    0.555121] test_bitmap: bitmap_print_to_pagebuf: input is '0-32767
[    0.555121] ', Time: 1278
[    0.578392] test_bitmap: Time spent in test_bitmap_read_perf:	427864
[    0.580137] test_bitmap: Time spent in test_bitmap_write_perf:	793554
[    0.581957] test_bitmap: all 390447 tests passed

And after:

[    0.314982] test_bitmap: parselist('0-2047:128/256'):	135
[    0.315517] test_bitmap: scnprintf("%*pbl", '0-32767'):	342
[    0.330045] test_bitmap: test_bitmap_read_perf:		252294
[    0.331132] test_bitmap: test_bitmap_write_perf:		539001
[    0.332163] test_bitmap: all 390447 tests passed

Signed-off-by: Yury Norov <ynorov@nvidia.com>