arm: qemu: Switch to standard boot

Drop use of the distro scripts and use standard boot instead.

Enable BOOTDEV_FULL just for convenience, although this does add quite a
bit to the size.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/qemu_arm_defconfig b/configs/qemu_arm_defconfig
index f0ee546..ad02526 100644
--- a/configs/qemu_arm_defconfig
+++ b/configs/qemu_arm_defconfig
@@ -14,13 +14,14 @@
 CONFIG_ENV_ADDR=0x4000000
 CONFIG_DEBUG_UART=y
 CONFIG_AHCI=y
-CONFIG_DISTRO_DEFAULTS=y
 CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
 CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x40200000
 CONFIG_FIT=y
 CONFIG_FIT_SIGNATURE=y
 CONFIG_FIT_VERBOSE=y
 CONFIG_FIT_BEST_MATCH=y
+CONFIG_BOOTSTD_FULL=y
+CONFIG_BOOTSTD_DEFAULTS=y
 CONFIG_LEGACY_IMAGE_FORMAT=y
 CONFIG_USE_PREBOOT=y
 # CONFIG_DISPLAY_CPUINFO is not set
@@ -28,6 +29,7 @@
 CONFIG_PCI_INIT_R=y
 CONFIG_SYS_CBSIZE=512
 CONFIG_SYS_PBSIZE=532
+CONFIG_CMD_BOOTZ=y
 CONFIG_SYS_BOOTM_LEN=0x4000000
 CONFIG_CMD_BOOTEFI_SELFTEST=y
 CONFIG_CMD_NVEDIT_EFI=y