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/pc-bios/meson.build b/pc-bios/meson.build
index 8087e5c..182d5eb 100644
--- a/pc-bios/meson.build
+++ b/pc-bios/meson.build
@@ -81,6 +81,7 @@
   'opensbi-riscv64-generic-fw_dynamic.bin',
   'opensbi-riscv32-generic-fw_dynamic.elf',
   'opensbi-riscv64-generic-fw_dynamic.elf',
+  'npcm7xx_bootrom.bin',
 )
 
 if install_blobs