firmware: arm_scmi: Remove zero-length array in SCMI notifications

Substitute zero-length array defined in scmi_base_error_report with
a flexible length array definition.

Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Cristian Marussi <[email protected]>
Signed-off-by: Sudeep Holla <[email protected]>

Author: cris-ma

include/linux/scmi_protocol.h

@@ -421,7 +421,7 @@ struct scmi_base_error_report {
 	u32 agent_id;
 	bool fatal;
 	u16 cmd_count;
-	u64 reports[0];
+	u64 reports[];
 };
 
 #endif /* _LINUX_SCMI_PROTOCOL_H */