For sound setups using the simple-card mechanism, the main clock
(sysclk) is expected to be the first element. For the i2s-driver
itself it doesn't matter, as it uses named clocks, so we can just
swap them.
Reported-by: Caesar Wang <wxt@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>