ti: k3: drivers: ti_sci: Put sequence number in coherent memory

The current message sequence number is accessed both with caches on and
off so put this memory in the un-cached coherent section so accesses
are consistent and coherency is maintained.
Signed-off-by: Andrew F. Davis <afd@ti.com>
Change-Id: Ieeefefeaffc691e4e4c4de7c74490d50ff9de807

plat/ti/k3/common/drivers/ti_sci/ti_sci.c

@@ -20,6 +20,9 @@
 #include "ti_sci_protocol.h"
 #include "ti_sci.h"
 
+#if USE_COHERENT_MEM
+__section("tzfw_coherent_mem")
+#endif
 static uint8_t message_sequence;
 
 /**