drm/amd/display: Allow PHY state update between same states

[Why & How]
In some cases, there are calls to transition from TX_ON to TX_ON, such as
when using MST or during resolution change. This is expected, so allow HW
programming to continue.
Reviewed-by: Alvin Lee <Alvin.Lee2@amd.com>
Acked-by: Brian Chang <Brian.Chang@amd.com>
Signed-off-by: Taimur Hassan <Syed.Hassan@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn32/dcn32_hwseq.c

@@ -1224,9 +1224,6 @@ void dcn32_update_phy_state(struct dc_state *state, struct pipe_ctx *pipe_ctx,
 {
 	enum phy_state current_state = pipe_ctx->stream->link->phy_state;
 
-	if (current_state == target_state)
-		return;
-
 	if (target_state == TX_OFF_SYMCLK_OFF) {
 		core_link_disable_stream(pipe_ctx);
 		pipe_ctx->stream->link->phy_state = TX_OFF_SYMCLK_OFF;