lantiq: ltq-adsl: add kernel 5.10 compatiblity

The pgprot argument to __vmalloc is always PAGE_KERNEL now and was
removed.

Signed-off-by: Mathias Kresin <[email protected]>

package/kernel/lantiq/ltq-adsl/patches/150-linux_5.9.patch

@@ -0,0 +1,14 @@
+--- a/src/common/drv_dsl_cpe_os_linux.c
++++ b/src/common/drv_dsl_cpe_os_linux.c
+@@ -417,7 +417,11 @@ int DSL_DRV_ErrorToOS(DSL_Error_t nError
+ DSL_void_t* DSL_DRV_VMalloc(
+    DSL_DRV_size_t    nSize)
+ {
++#if LINUX_VERSION_CODE < KERNEL_VERSION(5,9,0)
+    return __vmalloc((unsigned long)nSize, GFP_KERNEL, PAGE_KERNEL);
++#else
++   return __vmalloc((unsigned long)nSize, GFP_KERNEL);
++#endif
+    /*   return vmalloc(nSize);*/
+ }
+