drm/amd/display: fix HDCP reset sequence on reinitialize

[why]
When setup is called after hdcp has already setup,
it would cause to disable HDCP flow won’t execute.

[how]
Don't clean up hdcp content to be 0.
Signed-off-by: Brandon Syu <Brandon.Syu@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Wayne Lin <waynelin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/modules/hdcp/hdcp.c

@@ -260,7 +260,6 @@ enum mod_hdcp_status mod_hdcp_setup(struct mod_hdcp *hdcp,
 	struct mod_hdcp_output output;
 	enum mod_hdcp_status status = MOD_HDCP_STATUS_SUCCESS;
 
-	memset(hdcp, 0, sizeof(struct mod_hdcp));
 	memset(&output, 0, sizeof(output));
 	hdcp->config = *config;
 	HDCP_TOP_INTERFACE_TRACE(hdcp);