Linux 4.18 compat: Kconfig

The kernel's top level Kconfig was updated in 4.18 such that it
no longer matches the expected pattern preventing the spl source
from being inserted.  Simplify the existing logic to always insert
the entry at the end of the file since an exact location is not
required, unlike in the Makefile.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #7890

copy-builtin

@@ -88,32 +88,7 @@ EOF
 	done
 } > "$KERNEL_DIR/spl/Kbuild"
 
-add_after()
-{
-	local FILE="$1"
-	local MARKER="$2"
-	local NEW="$3"
-	local LINE
-
-	while IFS='' read -r LINE
-	do
-		echo "$LINE"
-
-		if [ -n "$MARKER" -a "$LINE" = "$MARKER" ]
-		then
-			echo "$NEW"
-			MARKER=''
-			if IFS='' read -r LINE
-			then
-				[ "$LINE" != "$NEW" ] && echo "$LINE"
-			fi
-		fi
-	done < "$FILE" > "$FILE.new"
-
-	mv "$FILE.new" "$FILE"
-}
-
-add_after "$KERNEL_DIR/Kconfig" 'source "arch/$SRCARCH/Kconfig"' 'source "spl/Kconfig"'
+echo 'source "spl/Kconfig"' >>"$KERNEL_DIR/Kconfig"
 # We must take care to build SPL before ZFS, otherwise the symbols required
 # to link ZFS will not be available.
 sed -i 's~mm/ fs/~mm/ spl/ fs/~' "$KERNEL_DIR/Makefile"