MAINTAINERS: Add co-maintainer for remoteproc subsystems

Add myself as co-maintainer for the remote processor related subsystems,
as agreed with Ohad.
Acked-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

MAINTAINERS

@@ -4967,6 +4967,7 @@ F:	include/linux/hw_random.h
 
 HARDWARE SPINLOCK CORE
 M:	Ohad Ben-Cohen <ohad@wizery.com>
+M:	Bjorn Andersson <bjorn.andersson@linaro.org>
 S:	Maintained
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/ohad/hwspinlock.git
 F:	Documentation/hwspinlock.txt
@@ -9136,6 +9137,7 @@ F:	include/linux/regmap.h
 
 REMOTE PROCESSOR (REMOTEPROC) SUBSYSTEM
 M:	Ohad Ben-Cohen <ohad@wizery.com>
+M:	Bjorn Andersson <bjorn.andersson@linaro.org>
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/ohad/remoteproc.git
 S:	Maintained
 F:	drivers/remoteproc/
@@ -9144,6 +9146,7 @@ F:	include/linux/remoteproc.h
 
 REMOTE PROCESSOR MESSAGING (RPMSG) SUBSYSTEM
 M:	Ohad Ben-Cohen <ohad@wizery.com>
+M:	Bjorn Andersson <bjorn.andersson@linaro.org>
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/ohad/rpmsg.git
 S:	Maintained
 F:	drivers/rpmsg/