MAINTAINERS: Add keystone clock drivers

Cc: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index 25b945b..249651f 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1013,6 +1013,7 @@
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Maintained
 F:	arch/arm/mach-keystone/
+F:	drivers/clk/keystone/
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone.git
 
 ARM/LOGICPD PXA270 MACHINE SUPPORT