clk: rockchip: Fix clock gate for rk3188 hclk_emem_peri

Do not disable clock gate "hclk_emem_peri", otherwise EMAC clocks no longer work
and it breaks ethernet on RK3066 and RK3188. It fixes a regression introduced by
commit 78eaf609 ("clk: rockchip: disable unused clocks").

Signed-off-by: Romain Perier <romain.perier@gmail.com>
Fixes: 78eaf609 ("clk: rockchip: disable unused clocks")
Signed-off-by: Heiko Stuebner <heiko@sntech.de>