ASoC: mmp-sspa: A trivial typo fix

"Transmit", not "Tansmit".

Signed-off-by: Lubomir Rintel <lkundrak@v3.sk>
Link: https://lore.kernel.org/r/20200511210134.1224532-4-lkundrak@v3.sk


Signed-off-by: Mark Brown <broonie@kernel.org>