sysreset: enable driver support in SPL/TPL

SPL/TPL also need use sysreset for some feature like panic callback.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
diff --git a/configs/sandbox_spl_defconfig b/configs/sandbox_spl_defconfig
index a46edee..e2826a6 100644
--- a/configs/sandbox_spl_defconfig
+++ b/configs/sandbox_spl_defconfig
@@ -174,6 +174,7 @@
 CONFIG_SPMI=y
 CONFIG_SPMI_SANDBOX=y
 CONFIG_SYSRESET=y
+CONFIG_SPL_SYSRESET=y
 CONFIG_TIMER=y
 CONFIG_TIMER_EARLY=y
 CONFIG_SANDBOX_TIMER=y