MAINTAINERS: Add file patterns for remoteproc device tree bindings

Submitters of device tree binding documentation may forget to CC
the subsystem maintainer if this is missing.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ohad Ben-Cohen <ohad@wizery.com>
Cc: linux-remoteproc@vger.kernel.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

MAINTAINERS

@@ -9591,8 +9591,9 @@ M:	Bjorn Andersson <bjorn.andersson@linaro.org>
 L:	linux-remoteproc@vger.kernel.org
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc.git
 S:	Maintained
-F:	drivers/remoteproc/
+F:	Documentation/devicetree/bindings/remoteproc/
 F:	Documentation/remoteproc.txt
+F:	drivers/remoteproc/
 F:	include/linux/remoteproc.h
 
 REMOTE PROCESSOR MESSAGING (RPMSG) SUBSYSTEM