clk: rockchip: add rv1108 ACLK_GAMC and PCLK_GMAC ID

This patch exports gmac aclk and pclk for dts reference.

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>