phy: rockchip: samsung-hdptx: Drop hw_rate driver data

phy: rockchip: samsung-hdptx: Drop hw_rate driver data

The ->hw_rate member of struct rk_hdptx_phy was mainly used to keep
track of the clock rate programmed in hardware and support implementing
the ->recalc_rate() callback in hdptx_phy_clk_ops.

Computing the clock rate from the actual PHY PLL configuration seems to
work reliably, hence remove the now redundant struct member.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Link: https://patch.msgid.link/20260113-phy-hdptx-frl-v6-8-8d5f97419c0b@collabora.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>