drm/msm/dp: displayPort driver need algorithm rational

stable inclusion
from stable-v5.10.94
commit 027165c491e49109c75bbb7bc877a2f83583754d
bugzilla: https://gitee.com/openeuler/kernel/issues/I531X9

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=027165c491e49109c75bbb7bc877a2f83583754d

--------------------------------

[ Upstream commit 53d22794 ]

Let's select RATIONAL with dp driver. avoid like:

[...]
x86_64-linux-gnu-ld: drivers/gpu/drm/msm/dp/dp_catalog.o: in function `dp_catalog_ctrl_config_msa':
dp_catalog.c:(.text+0x57e): undefined reference to `rational_best_approximation'

Fixes: c943b494 ("drm/msm/dp: add displayPort driver support")
Reported-by: Nkernelbot <kernel-bot@kylinos.cn>
Signed-off-by: NJackie Liu <liuyun01@kylinos.cn>
Link: https://lore.kernel.org/r/20211110070950.3355597-2-liu.yun@linux.devSigned-off-by: NDmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: NRob Clark <robdclark@chromium.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>

drivers/gpu/drm/msm/Kconfig

@@ -60,6 +60,7 @@ config DRM_MSM_HDMI_HDCP
 config DRM_MSM_DP
 	bool "Enable DisplayPort support in MSM DRM driver"
 	depends on DRM_MSM
+	select RATIONAL
 	default y
 	help
 	  Compile in support for DP driver in MSM DRM driver. DP external