ASoC: max98090: Move check for invalid values before casting in max98090_put_enab_tlv()

Validation of signed input should be done before casting to unsigned int.

Found by Linux Verification Center (linuxtesting.org) with SVACE.

Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Suggested-by: Mark Brown <broonie@kernel.org>
Fixes: 2fbe467b

 ("ASoC: max98090: Reject invalid values in custom control put()")
Link: https://lore.kernel.org/r/1652999486-29653-1-git-send-email-khoroshilov@ispras.ru
Signed-off-by: Mark Brown <broonie@kernel.org>