docs: Fix typo in Documentation/arm/marvell.rst

Fix typo in the documentation, changed from 'comatible' to
'compatible.
Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Link: https://lore.kernel.org/r/20210531134235.720351-1-iwamatsu@nigauri.orgSigned-off-by: Jonathan Corbet <corbet@lwn.net>

Documentation/arm/marvell.rst

@@ -259,7 +259,7 @@ Storage family
 	https://web.archive.org/web/20191129073953/http://www.marvell.com/storage/armada-sp/
 
   Core:
-	Sheeva ARMv7 comatible Quad-core PJ4C
+	Sheeva ARMv7 compatible Quad-core PJ4C
 
   (not supported in upstream Linux kernel)