video: ipu_disp: Return a negative value on error
We should return a negative error number (-EINVAL) on error.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
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We should return a negative error number (-EINVAL) on error.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>