[PATCH] phy: phy-rockchip-samsung-hdptx: Select CONFIG_RATIONAL

[Cristian Ciocaltea]

Ensure CONFIG_RATIONAL is selected in order to fix the following link
error with some kernel configurations:

drivers/phy/rockchip/phy-rockchip-samsung-hdptx.o: in function `rk_hdptx_ropll_tmds_cmn_config':
phy-rockchip-samsung-hdptx.c:(.text+0x950): undefined reference to `rational_best_approximation'

Fixes: 553be2830c5f ("phy: rockchip: Add Samsung HDMI/eDP Combo PHY driver")
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Closes: https://lore.kernel.org/oe-kbuild-all/202404090540.2l1TEkDF-lkp@xxxxxxxxx/
Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@xxxxxxxxxxxxx>
---
 drivers/phy/rockchip/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/phy/rockchip/Kconfig b/drivers/phy/rockchip/Kconfig
index a34f67bb7e61..b60a4b60451e 100644
--- a/drivers/phy/rockchip/Kconfig
+++ b/drivers/phy/rockchip/Kconfig
@@ -87,6 +87,7 @@ config PHY_ROCKCHIP_SAMSUNG_HDPTX
 	tristate "Rockchip Samsung HDMI/eDP Combo PHY driver"
 	depends on (ARCH_ROCKCHIP || COMPILE_TEST) && OF
 	select GENERIC_PHY
+	select RATIONAL
 	help
 	  Enable this to support the Rockchip HDMI/eDP Combo PHY
 	  with Samsung IP block.
-- 
2.44.0