[ARM] 5217/1: update maintainer entry for CompuLab machines

Signed-off-by: NMike Rapoport <mike@compulab.co.il>
Acked-by: NEric Miao <eric.miao@marvell.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

MAINTAINERS

@@ -486,7 +486,7 @@ M:	kernel@wantstofly.org
 L:	linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)
 S:	Maintained
 
-ARM/COMPULAB CM-X270/EM-X270 MACHINE SUPPORT
+ARM/COMPULAB CM-X270/EM-X270 and CM-X300 MACHINE SUPPORT
 P:	Mike Rapoport
 M:	mike@compulab.co.il
 L:	linux-arm-kernel@lists.arm.linux.org.uk (subscribers-only)