reset: implement a reset test

This adds a sandbox reset implementation (provider), a test client
device, instantiates them both from Sandbox's DT, and adds a DM test
that excercises everything.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/configs/sandbox_defconfig b/configs/sandbox_defconfig
index 4eb3c22..94253a6 100644
--- a/configs/sandbox_defconfig
+++ b/configs/sandbox_defconfig
@@ -1,4 +1,5 @@
 CONFIG_SYS_MALLOC_F_LEN=0x2000
+CONFIG_BLK=y
 CONFIG_MMC=y
 CONFIG_PCI=y
 CONFIG_DEFAULT_DEVICE_TREE="sandbox"
@@ -70,7 +71,6 @@
 CONFIG_DEBUG_DEVRES=y
 CONFIG_ADC=y
 CONFIG_ADC_SANDBOX=y
-CONFIG_BLK=y
 CONFIG_CLK=y
 CONFIG_CPU=y
 CONFIG_DM_DEMO=y
@@ -89,6 +89,9 @@
 CONFIG_CROS_EC_KEYB=y
 CONFIG_LED=y
 CONFIG_LED_GPIO=y
+CONFIG_DM_MAILBOX=y
+CONFIG_SANDBOX_MBOX=y
+CONFIG_MISC=y
 CONFIG_CMD_CROS_EC=y
 CONFIG_CROS_EC=y
 CONFIG_CROS_EC_I2C=y
@@ -140,6 +143,8 @@
 CONFIG_REGULATOR_TPS65090=y
 CONFIG_RAM=y
 CONFIG_REMOTEPROC_SANDBOX=y
+CONFIG_DM_RESET=y
+CONFIG_SANDBOX_RESET=y
 CONFIG_DM_RTC=y
 CONFIG_SANDBOX_SERIAL=y
 CONFIG_SOUND=y
@@ -170,6 +175,3 @@
 CONFIG_UT_TIME=y
 CONFIG_UT_DM=y
 CONFIG_UT_ENV=y
-CONFIG_MISC=y
-CONFIG_DM_MAILBOX=y
-CONFIG_SANDBOX_MBOX=y