drm/amd/display: Fix the typo in dcn401 Hubp block

drm/amd/display: Fix the typo in dcn401 Hubp block

[Why & How]
Fix the typo for hubp_clear_tiling, currently calls hubp2_clear_tiling
for dcn401 instead of intended hubp401_clear_tiling.

Reviewed-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Nevenko Stupar <Nevenko.Stupar@amd.com>
Signed-off-by: Tom Chung <chiahsuan.chung@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>