tools: kmod: remove snd_ump before snd_rawmidi

[harajend]

Problem

On MIDI2-enabled kernels snd_ump is loaded even when nothing is using it, and it holds a reference on snd_rawmidi. sof_remove.sh has no entry for it, so removal fails:

RMMOD	snd_rawmidi
rmmod: ERROR: Module snd_rawmidi is in use by: snd_ump
/home/ubuntu/sof-test/tools/kmod/sof_remove.sh FAILED

lsmod from the failing run confirms nothing is actually using it — it is just loaded and in the way:

snd_ump                49152  0
snd_rawmidi            57344  1 snd_ump
snd_seq_device         16384  3 snd_seq,snd_ump,snd_rawmidi

Because reload_drivers() aborts, every later test case that reloads the driver stack fails with it. On a NVL-S run this produced ~15 consecutive failures starting at check-sof-logger.sh, each with the same reload_drivers() backtrace.

Fix

Remove snd_ump immediately before snd_rawmidi, matching the existing ordering convention for dependants in this file.

remove_module() already prints SKIP ... not loaded and continues for modules that are not present, so this is a no-op on kernels built without CONFIG_SND_UMP.

Testing

bash -n clean. Verified against the lsmod state above that snd_ump has no dependants of its own, so removing it at this point in the sequence cannot strand anything else.

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