drm/amd/display: Unassign does_plane_fit_in_mall function from dcn3.2

[Why]
The hwss function does_plane_fit_in_mall not applicable to dcn3.2 asics.
Using it with dcn3.2 can result in undefined behaviour.

[How]
Assign the function pointer to NULL.

Reviewed-by: Alvin Lee <[e-mail]>
Acked-by: Alex Hung <[e-mail]>
Signed-off-by: George Shen <[e-mail]>
Tested-by: Daniel Wheeler <[e-mail]>
Signed-off-by: Alex Deucher <[e-mail]>

drivers/gpu/drm/amd/display/dc/dcn32/dcn32_init.c

···
 	.get_vupdate_offset_from_vsync = dcn10_get_vupdate_offset_from_vsync,
 	.calc_vupdate_position = dcn10_calc_vupdate_position,
 	.apply_idle_power_optimizations = dcn32_apply_idle_power_optimizations,
-	.does_plane_fit_in_mall = dcn30_does_plane_fit_in_mall,
+	.does_plane_fit_in_mall = NULL,
 	.set_backlight_level = dcn21_set_backlight_level,
 	.set_abm_immediate_disable = dcn21_set_abm_immediate_disable,
 	.hardware_release = dcn30_hardware_release,