kernel: Remove chash.ko from kmod-drm-amdgpu

This module was added with kernel 4.15, but is was removed again with
kernel version 5.3. OpenWrt does not support specifying a kernel version
range so just break it with kernel 4.14 and only support recent kernel
versions.

Signed-off-by: Hauke Mehrtens <[email protected]>

package/kernel/linux/modules/video.mk

@@ -285,7 +285,7 @@ define KernelPackage/drm-amdgpu
 	CONFIG_DEBUG_KERNEL_DC=n
   FILES:=$(LINUX_DIR)/drivers/gpu/drm/amd/amdgpu/amdgpu.ko \
 	$(LINUX_DIR)/drivers/gpu/drm/scheduler/[email protected] \
-	$(LINUX_DIR)/drivers/gpu/drm/amd/lib/chash.ko@ge4.15
+	$(LINUX_DIR)/drivers/gpu/drm/amd/lib/chash.ko@lt5.3
   AUTOLOAD:=$(call AutoProbe,amdgpu)
 endef