Revert "drm/amd/display: Fix pbn to kbps Conversion"

Revert "drm/amd/display: Fix pbn to kbps Conversion"

Deeply daisy chained DP/MST displays are no longer able to light
up. This reverts commit e0dec00f3d05 ("drm/amd/display: Fix pbn
to kbps Conversion")

Cc: Jerry Zuo <jerry.zuo@amd.com>
Reported-by: nat@nullable.se
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4756
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit e1c94109c76e8a77a21531bd53f6c63356c81158)
Cc: stable@vger.kernel.org # 6.17+