hal: cirrus_playback: remove workaround for b1 p1.0

This removes workaround that was needed to disable speaker protection
for B1 P1.0 devices.

Bug: 73728452
Test: manual audio test
Change-Id: Ifd54b0e534296e0fbcebae16a9a79f69a98983ec
Signed-off-by: David Lin <dtwlin@google.com>