remoteproc,rpmsg: add missing MAINTAINERS file entries

Add a few missing file and directory entries related to both
remoteproc and rpmsg.
Signed-off-by: Robert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

MAINTAINERS

@@ -13342,9 +13342,11 @@ L:	linux-remoteproc@vger.kernel.org
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc.git
 S:	Maintained
 F:	Documentation/devicetree/bindings/remoteproc/
+F:	Documentation/ABI/testing/sysfs-class-remoteproc
 F:	Documentation/remoteproc.txt
 F:	drivers/remoteproc/
 F:	include/linux/remoteproc.h
+F:	include/linux/remoteproc/
 
 REMOTE PROCESSOR MESSAGING (RPMSG) SUBSYSTEM
 M:	Ohad Ben-Cohen <ohad@wizery.com>
@@ -13354,8 +13356,11 @@ T:	git git://git.kernel.org/pub/scm/linux/kernel/git/ohad/rpmsg.git
 S:	Maintained
 F:	drivers/rpmsg/
 F:	Documentation/rpmsg.txt
+F:	Documentation/ABI/testing/sysfs-bus-rpmsg
 F:	include/linux/rpmsg.h
 F:	include/linux/rpmsg/
+F:	include/uapi/linux/rpmsg.h
+F:	samples/rpmsg/
 
 RENESAS CLOCK DRIVERS
 M:	Geert Uytterhoeven <geert+renesas@glider.be>