roms/Makefile: build ast27x0_bootrom

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/3052
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Tested-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Link: https://lore.kernel.org/qemu-devel/607a943a587248fbe0ff0897de80aee98a093caa.1753654515.git.mjt@tls.msk.ru
[ clg: Removed make CC= workaround ]
Reviewed-by: Jamin Lin <jamin_lin@aspeedtech.com>
Signed-off-by: Cédric Le Goater <clg@redhat.com>

roms/Makefile

@@ -68,6 +68,7 @@ default help:
 	@echo "  u-boot.sam460      -- update u-boot.sam460"
 	@echo "  npcm7xx_bootrom    -- update vbootrom for npcm7xx"
 	@echo "  npcm8xx_bootrom    -- update vbootrom for npcm8xx"
+	@echo "  ast27x0_bootrom    -- update vbootrom for ast27x0"
 	@echo "  efi                -- update UEFI (edk2) platform firmware"
 	@echo "  opensbi32-generic  -- update OpenSBI for 32-bit generic machine"
 	@echo "  opensbi64-generic  -- update OpenSBI for 64-bit generic machine"
@@ -200,6 +201,10 @@ npcm8xx_bootrom:
 	$(MAKE) -C vbootrom/npcm8xx CROSS_COMPILE=$(aarch64_cross_prefix)
 	cp vbootrom/npcm8xx/npcm8xx_bootrom.bin ../pc-bios/npcm8xx_bootrom.bin
 
+ast27x0_bootrom:
+	$(MAKE) -C vbootrom/ast27x0 CROSS_COMPILE=$(aarch64_cross_prefix)
+	cp vbootrom/ast27x0/ast27x0_bootrom.bin ../pc-bios/ast27x0_bootrom.bin
+
 hppa-firmware:
 	$(MAKE) -C seabios-hppa parisc
 	cp seabios-hppa/out/hppa-firmware.img      ../pc-bios/