MAINTAINERS: Add entry for AMD PENSANDO

Add entry for AMD PENSANDO maintainer and files
Signed-off-by: Brad Larson <blarson@amd.com>
Link: https://lore.kernel.org/r/20230925195610.47971-3-blarson@amd.comSigned-off-by: Arnd Bergmann <arnd@arndb.de>

MAINTAINERS

@@ -1816,6 +1816,13 @@ N:	allwinner
 N:	sun[x456789]i
 N:	sun[25]0i
 
+ARM/AMD PENSANDO ARM64 ARCHITECTURE
+M:	Brad Larson <blarson@amd.com>
+L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
+S:	Supported
+F:	Documentation/devicetree/bindings/*/amd,pensando*
+F:	arch/arm64/boot/dts/amd/elba*
+
 ARM/Amlogic Meson SoC CLOCK FRAMEWORK
 M:	Neil Armstrong <neil.armstrong@linaro.org>
 M:	Jerome Brunet <jbrunet@baylibre.com>