sandbox: Drop CONFIG_SYS_TIMER_RATE

This is not used by sandbox since it uses driver model for the timer.

Drop it.

Also update the tools_only build to avoid build errors, since it does
actually build U-Boot too. Enable DM so we can use CONFIG_TIMER,
disable EFI_LOADER to avoid an error about board_quiesce_devices() and
disable NET to avoid having to define CONFIG_AVB_BUF_ADDR

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/tools-only_defconfig b/configs/tools-only_defconfig
index 400b050..5ffc625 100644
--- a/configs/tools-only_defconfig
+++ b/configs/tools-only_defconfig
@@ -13,23 +13,22 @@
 # CONFIG_CMD_BOOTM is not set
 # CONFIG_CMD_ELF is not set
 # CONFIG_CMD_EXTENSION is not set
-CONFIG_BOOTP_DNS2=y
 # CONFIG_CMD_DATE is not set
 CONFIG_OF_CONTROL=y
 CONFIG_SYS_RELOC_GD_ENV_ADDR=y
-CONFIG_BOOTP_SEND_HOSTNAME=y
-CONFIG_IP_DEFRAG=y
+# CONFIG_NET is not set
 # CONFIG_ACPIGEN is not set
 CONFIG_AXI=y
 CONFIG_AXI_SANDBOX=y
-# CONFIG_UDP_FUNCTION_FASTBOOT is not set
 CONFIG_SANDBOX_GPIO=y
 CONFIG_PCI=y
 CONFIG_PCI_SANDBOX=y
 CONFIG_DM_RTC=y
 CONFIG_SOUND=y
 CONFIG_SYSRESET=y
+CONFIG_TIMER=y
 CONFIG_I2C_EDID=y
 # CONFIG_VIRTIO_MMIO is not set
 # CONFIG_VIRTIO_PCI is not set
 # CONFIG_VIRTIO_SANDBOX is not set
+# CONFIG_EFI_LOADER is not set