staging: greybus: add Viresh as maintainer of few greybus protocol drivers

Add Viresh Kumar as Maintainer of some of the Greybus protocol drivers.
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

MAINTAINERS

@@ -5314,6 +5314,23 @@ F:	drivers/staging/greybus/loopback.c
 F:	drivers/staging/greybus/timesync.c
 F:	drivers/staging/greybus/timesync_platform.c
 
+GREYBUS PROTOCOLS DRIVERS
+M:	Viresh Kumar <vireshk@kernel.org>
+S:	Maintained
+F:	drivers/staging/greybus/authentication.c
+F:	drivers/staging/greybus/bootrom.c
+F:	drivers/staging/greybus/firmware.h
+F:	drivers/staging/greybus/fw-core.c
+F:	drivers/staging/greybus/fw-download.c
+F:	drivers/staging/greybus/fw-managament.c
+F:	drivers/staging/greybus/greybus_authentication.h
+F:	drivers/staging/greybus/greybus_firmware.h
+F:	drivers/staging/greybus/hid.c
+F:	drivers/staging/greybus/i2c.c
+F:	drivers/staging/greybus/spi.c
+F:	drivers/staging/greybus/spilib.c
+F:	drivers/staging/greybus/spilib.h
+
 GSPCA FINEPIX SUBDRIVER
 M:	Frank Zago <frank@zago.net>
 L:	linux-media@vger.kernel.org