msm: qdsp6: change normal operation prints to pr_debug

There is no need to print port numbers and indices every time the phone
plays a sound. Instead, make these pr_debugs, so that they can still be
turned on for debugging purposes while not clogging normal logs.

Change-Id: Id1a8584ebc3e0160b170820eb4c47c8491388f45
Signed-off-by: Jeff Ohlstein <johlstei@codeaurora.org>