soundwire: bus: Fix wrong port number in sdw_handle_slave_alerts()

soundwire: bus: Fix wrong port number in sdw_handle_slave_alerts()

for_each_set_bit() gives the bit-number counting from 0 (LSbit==0).
When processing INTSTAT2, bit 0 is DP4 so the port number is (bit + 4).
Likewise for INTSTAT3 bit 0 is DP11 so port number is (bit + 11).

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220917140256.689678-1-rf@opensource.cirrus.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>