roms: Add virtual Boot ROM for NPCM7xx SoCs

This is a minimalistic boot ROM written specifically for use with QEMU.
It supports loading the second-stage loader from SPI flash into RAM, SMP
boot, and not much else.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Havard Skinnemoen <hskinnemoen@google.com>
Message-id: 20200911052101.2602693-7-hskinnemoen@google.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
diff --git a/MAINTAINERS b/MAINTAINERS
index c95a00c..3d17cad 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -757,6 +757,8 @@
 S: Supported
 F: hw/*/npcm7xx*
 F: include/hw/*/npcm7xx*
+F: pc-bios/npcm7xx_bootrom.bin
+F: roms/vbootrom
 
 nSeries
 M: Andrzej Zaborowski <balrogg@gmail.com>