sysreset: psci: enable DM_FLAG_PRE_RELOC

It is possible that cpu core may reset before relocation with PSCI reset

Signed-off-by: Peng Fan <peng.fan@nxp.com>
diff --git a/drivers/sysreset/sysreset_psci.c b/drivers/sysreset/sysreset_psci.c
index 83ecbcb..30c4b9c 100644
--- a/drivers/sysreset/sysreset_psci.c
+++ b/drivers/sysreset/sysreset_psci.c
@@ -34,4 +34,5 @@
 	.name = "psci-sysreset",
 	.id = UCLASS_SYSRESET,
 	.ops = &psci_sysreset_ops,
+	.flags = DM_FLAG_PRE_RELOC,
 };