firmware: qcom: qseecom: add missing include guards

The qseecom header does not contain ifdef guards against multiple
inclusion. Add them.

Fixes: 00b1248606ba ("firmware: qcom_scm: Add support for Qualcomm Secure Execution Environment SCM interface")
Signed-off-by: Bartosz Golaszewski <[e-mail]>
Reviewed-by: Maximilian Luz <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Bjorn Andersson <[e-mail]>

include/linux/firmware/qcom/qcom_qseecom.h

···
  *
  * Copyright (C) 2023 Maximilian Luz <[e-mail]>
  */
+
+#ifndef __QCOM_QSEECOM_H
+#define __QCOM_QSEECOM_H
+
 #include <linux/auxiliary_bus.h>
 #include <linux/types.h>
 
···
 {
 	return qcom_scm_qseecom_app_send(client->app_id, req, req_size, rsp, rsp_size);
 }
+
+#endif /* __QCOM_QSEECOM_H */