Fix common misspellings

Fixes generated by 'codespell' and manually reviewed.

Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
diff --git a/include/linux/can/netlink.h b/include/linux/can/netlink.h
index 3250de9..34542d3 100644
--- a/include/linux/can/netlink.h
+++ b/include/linux/can/netlink.h
@@ -17,7 +17,7 @@
 /*
  * CAN bit-timing parameters
  *
- * For futher information, please read chapter "8 BIT TIMING
+ * For further information, please read chapter "8 BIT TIMING
  * REQUIREMENTS" of the "Bosch CAN Specification version 2.0"
  * at http://www.semiconductors.bosch.de/pdf/can2spec.pdf.
  */