arm: switch boards to "default y"

For ARM targets, boards that require TCG are already using "default y".
Switch ARM_VIRT to the same selection mechanism.

No changes to generated config-devices.mak file.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

.gitlab-ci.d/buildtest.yml

@@ -648,6 +648,7 @@ build-tci:
     - make check-tcg
 
 # Check our reduced build configurations
+# requires libfdt: aarch64, arm
 build-without-defaults:
   extends: .native_build_job_template
   needs:

configs/devices/arm-softmmu/default.mak

@@ -5,7 +5,8 @@
 # CONFIG_PCI_DEVICES=n
 # CONFIG_TEST_DEVICES=n
 
-CONFIG_ARM_VIRT=y
+# Boards are selected by default, uncomment to keep out of the build.
+# CONFIG_ARM_VIRT=n
 
 # These are selected by default when TCG is enabled, uncomment them to
 # keep out of the build.

hw/arm/Kconfig

@@ -1,5 +1,7 @@
 config ARM_VIRT
     bool
+    default y
+    depends on ARM
     imply PCI_DEVICES
     imply TEST_DEVICES
     imply VFIO_AMD_XGBE