MAINTAINERS: Add DTS files to patterns for Samsung platform

Help ensure that updates to the Samsung device trees get sent to the
Samsung maintainers for review by adding file patterns to MAINTAINERS.

Signed-off-by: Mark Brown <broonie@linaro.org>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/MAINTAINERS b/MAINTAINERS
index e61c2e8..d2c3370 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1154,6 +1154,8 @@
 L:	linux-samsung-soc@vger.kernel.org (moderated for non-subscribers)
 W:	http://www.fluff.org/ben/linux/
 S:	Maintained
+F:	arch/arm/boot/dts/s3c*
+F:	arch/arm/boot/dts/exynos*
 F:	arch/arm/plat-samsung/
 F:	arch/arm/mach-s3c24*/
 F:	arch/arm/mach-s3c64xx/