clk: rockchip: fix ID of 8ch clock of I2S1 for rk3328

This patch fixes mistakes in HCLK_I2S1_8CH for running I2S1
successfully.

Signed-off-by: Katsuhiro Suzuki <katsuhiro@katsuster.net>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>