'struct scmi_transport_ops' is not modified in this driver.

Constifying this structure moves some data to a read-only section, so
increases overall security, especially when the structure holds some
function pointers.

On a x86_64, with allmodconfig, as an example:
Before:
======
   text	   data	    bss	    dec	    hex	filename
   6907	    680	     48	   7635	   1dd3	drivers/firmware/arm_scmi/transports/optee.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
   6987	    576	     48	   7611	   1dbb	drivers/firmware/arm_scmi/transports/optee.o

Signed-off-by: Christophe JAILLET <redacted>
---
Compile tested only
---
 drivers/firmware/arm_scmi/transports/optee.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/firmware/arm_scmi/transports/optee.c b/drivers/firmware/arm_scmi/transports/optee.c
index 3949a877e17d..dc0f46340153 100644
--- a/drivers/firmware/arm_scmi/transports/optee.c
+++ b/drivers/firmware/arm_scmi/transports/optee.c

@@ -498,7 +498,7 @@ static void scmi_optee_mark_txdone(struct scmi_chan_info *cinfo, int ret,
 	mutex_unlock(&channel->mu);
 }
 
-static struct scmi_transport_ops scmi_optee_ops = {
+static const struct scmi_transport_ops scmi_optee_ops = {
 	.chan_available = scmi_optee_chan_available,
 	.chan_setup = scmi_optee_chan_setup,
 	.chan_free = scmi_optee_chan_free,

-- 
2.50.1