drm/tegra: dsi: Fix missing pm_runtime_disable() in the error handling path of tegra_dsi_probe()

If an error occurs after calling pm_runtime_enable(), pm_runtime_disable()
should be called as already done in the remove function.

Fixes: ef8187d7

 ("drm/tegra: dsi: Implement runtime PM")
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ee4a15c9cd4b574a55cd67c30d2411239ba2cee9.1693667005.git.christophe.jaillet@wanadoo.fr