Jianguo Sun's email address reported in MAINTAINERS is not active any
longer, remove it from the DWC HiSilicon STB entry.
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Shawn Guo <shawn.guo@linaro.org>
Acked-by: NShawn Guo <shawn.guo@linaro.org>