media: mipi-csis: Add check for clk_enable()

[ Upstream commit 125ad1aeec77eb55273b420be6894b284a01e4b6 ]

Add check for the return value of clk_enable() to gurantee the success.

Fixes: b5f1220d ("[media] v4l: Add v4l2 subdev driver for S5P/EXYNOS4 MIPI-CSI receivers")
Signed-off-by: Jiasheng Jiang <jiashengjiangcool@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>