drm/amd/display: refactor gpio to allocate hw_container in constructor

[why]
if dynamic allocation fails during gpio_open, it will cause crash due to
page fault.

[how]
handle allocation when gpio o

drm/amd/display: refactor gpio to allocate hw_container in constructor

[why]
if dynamic allocation fails during gpio_open, it will cause crash due to
page fault.

[how]
handle allocation when gpio object gets created and prevent from calling
gpio_open if allocation failed

Signed-off-by: Su Sung Chung <[email protected]>
Reviewed-by: Jun Lei <[email protected]>
Acked-by: Leo Li <[email protected]>
Signed-off-by: Alex Deucher <[email protected]>

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