hw/arm/exynos4210: Put external GIC into state struct

Switch the creation of the external GIC to the new-style "embedded in
state struct" approach, so we can easily refer to the object
elsewhere during realize.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220404154658.565020-9-peter.maydell@linaro.org
diff --git a/MAINTAINERS b/MAINTAINERS
index dcedfae..294c88a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -648,7 +648,7 @@
 L: qemu-arm@nongnu.org
 S: Odd Fixes
 F: hw/*/exynos*
-F: include/hw/arm/exynos4210.h
+F: include/hw/*/exynos*
 
 Calxeda Highbank
 M: Rob Herring <robh@kernel.org>