kernel: modules: fix kmod-drm-imx-ldb dependency for 5.15

Fixes following issue:

 Package kmod-drm-imx-ldb is missing dependencies for the following libraries:
 drm_dp_aux_bus.ko

Introduced upstream in commit aeb33699fc2c ("drm: Introduce the DP AUX
bus") in kernel version 5.15.

Signed-off-by: Petr Štetiar <ynezz@true.cz>

package/kernel/linux/modules/video.mk

@@ -361,7 +361,8 @@ define KernelPackage/drm-imx-ldb
 	CONFIG_DRM_PANEL_S6E8AA0=n \
 	CONFIG_DRM_PANEL_SITRONIX_ST7789V=n
   FILES:=$(LINUX_DIR)/drivers/gpu/drm/imx/imx-ldb.ko \
-	$(LINUX_DIR)/drivers/gpu/drm/panel/panel-simple.ko
+	$(LINUX_DIR)/drivers/gpu/drm/panel/panel-simple.ko \
+	$(LINUX_DIR)/drivers/gpu/drm/drm_dp_aux_bus.ko@gt5.10
   AUTOLOAD:=$(call AutoLoad,08,imx-ldb)
 endef