phy: rockchip: samsung-hdptx: Consistently use [rk_]hdptx_[tmds_] prefixes

phy: rockchip: samsung-hdptx: Consistently use [rk_]hdptx_[tmds_] prefixes

Fix the naming inconsistencies for some of the functions and global
variables:

* Add the missing 'rk_hdptx_' prefix to ropll_tmds_cfg variable
* Replace '_ropll_tmds_' with '_tmds_ropll_' globally
* Replace 'hdtpx' with 'hdptx' globally

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patch.msgid.link/20260113-phy-hdptx-frl-v6-4-8d5f97419c0b@collabora.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>