thunderbolt: Read retimer NVM authentication status prior tb_retimer_set_inbound_sbtx()

[ Upstream commit 1402ba08 ]

According to the USB4 retimer guide the correct order is immediately
after sending ENUMERATE_RETIMERS so update the code to follow this.

Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>