util/qemu: Add config for AArch64

Most arguments taken from the Kconfig help. RAM needs to be >= 531M,
as coreboot is linked to reside between 512M..531M.

Tested `make qemu` with QEMU 7.2.0.

Change-Id: Id7f23918a786bc126188d5caf285e9f532dbb0ed
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/76042
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Felix Singer <service+coreboot-gerrit@felixsinger.de>
diff --git a/util/qemu/Makefile.inc b/util/qemu/Makefile.inc
index 651ef21..e1181ad 100644
--- a/util/qemu/Makefile.inc
+++ b/util/qemu/Makefile.inc
@@ -26,6 +26,9 @@
 #   $ # Force QEMU's built-in config
 #   $ make qemu QEMU_CFG_ARGS=
 
+QEMU-$(CONFIG_BOARD_EMULATION_QEMU_AARCH64)	?= qemu-system-aarch64 \
+	-M virt,secure=on,virtualization=on -cpu cortex-a53 -m 1G
+
 QEMU-$(CONFIG_BOARD_EMULATION_QEMU_X86_I440FX)	?= qemu-system-x86_64 -M pc
 
 QEMU-$(CONFIG_BOARD_EMULATION_QEMU_X86_Q35)	?= qemu-system-x86_64 -M q35