maintainers: Add Marvell to maintainers list

Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>
diff --git a/acknowledgements.rst b/acknowledgements.rst
index 9b81b6c..5686a58 100644
--- a/acknowledgements.rst
+++ b/acknowledgements.rst
@@ -14,5 +14,7 @@
 
 NXP Semiconductors
 
+Marvell International Ltd.
+
 Individuals
 -----------