soundwire: cadence: remove empty line after braces

Linux code style doesn't expect empty lines after braces and
gives warning:

CHECK: Blank lines aren't necessary after an open brace '{'

Remove the empty line in cadence lib

Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>