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/drivers/rtc/armada38x.c b/drivers/rtc/armada38x.c
index 2af64e3..d0fe5dd 100644
--- a/drivers/rtc/armada38x.c
+++ b/drivers/rtc/armada38x.c
@@ -2,7 +2,7 @@
 /*
  * RTC driver for the Armada 38x Marvell SoCs
  *
- * Copyright (C) 2021 Marek Behun <marek.behun@nic.cz>
+ * Copyright (C) 2021 Marek Behún <kabel@kernel.org>
  *
  * Based on Linux' driver by Gregory Clement and Marvell
  */