MAINTAINERS: Redo addition of ssm3515 to APPLE SOUND

The MAINTAINERS entries added in commit 4ac690bb ("ASoC: ssm3515:
Add new amp driver") were later erased in a merge commit. Re-add those.

Cc: Mark Brown <broonie@kernel.org>
Fixes: af53b00f ("Merge tag 'v6.4-rc2' into asoc-6.5 to get fixes for CI")
Signed-off-by: Martin Povišer <povik+lin@cutebit.org>
Link: https://lore.kernel.org/r/20230712121556.93500-1-povik+lin@cutebit.org


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