[U-Boot] [PATCH v8 3/9] rockchip: video: vop: Fix rk_display_init() return error

[sjg at google.com]

It's caused by the difference of clk_set_rate function implement between
rk3288 andd rk3399.

clk_set_rate() of rk3288 return 0 in normal condition.
clk_set_rate() of rk3399 return input parameter in normal condition.

So check clk_set_rate's return value by IS_ERR_VALUE.

Signed-off-by: Eric Gao <eric.gao at rock-chips.com>

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Changes in v8: None
Changes in v7:
-Using IS_ERR_VALUE to check the clk_set_rate' return value.

Changes in v6: None
Changes in v5:
-Drop previous change, and modify clk_set_rate implement in rk3399.

Changes in v4:
-Move this patch to an early stage.

Changes in v3:
-Improve indentation relationship

Changes in v2:
-Fix rk_display_init() function report error(err:-19).

 drivers/video/rockchip/rk_vop.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Applied to u-boot-rockchip/next, thanks!