phy: freescale: fsl-samsung-hdmi: Rename phy_clk_round_rate

phy_clk_round_rate sounds like a generic helper function.  In
reality, it is unique to the phy-fsl-samsung-hdmi. Rename
phy_clk_round_rate to fsl_samsung_hdmi_phy_clk_round_rate.
No functional change intended.

Suggested-by: Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Signed-off-by: Adam Ford <aford173@gmail.com>

Link: https://lore.kernel.org/r/20250504204043.418924-1-aford173@gmail.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>