treewide: Fix Marek's name and change my e-mail address

Fix diacritics in some instances of my name and change my e-mail address
to kabel@kernel.org.

Add corresponding .mailmap entries.

Signed-off-by: Marek BehĂșn <kabel@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/fs/btrfs/conv-funcs.h b/fs/btrfs/conv-funcs.h
index 30791cd..0a7af9d 100644
--- a/fs/btrfs/conv-funcs.h
+++ b/fs/btrfs/conv-funcs.h
@@ -2,7 +2,7 @@
 /*
  * Functions to convert BTRFS structures from disk to CPU endianness and back.
  *
- * 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
+ * 2017 Marek Behún, CZ.NIC, kabel@kernel.org
  */
 
 #ifndef __BTRFS_CONV_FUNCS_H__