sim/rx: mark some functions as static

Some functions that should be marked static.

sim/rx/ChangeLog:

	* fpu.c (check_exceptions): Make static.
	* gdb-if.c (handle_step): Likewise.
	* mem.c (mem_put_byte): Likewise.

sim/rx/ChangeLog

@@ -1,3 +1,9 @@
+2021-02-08  Andrew Burgess  <andrew.burgess@embecosm.com>
+
+	* fpu.c (check_exceptions): Make static.
+	* gdb-if.c (handle_step): Likewise.
+	* mem.c (mem_put_byte): Likewise.
+
 2021-02-08  Andrew Burgess  <andrew.burgess@embecosm.com>
 
 	* cpu.h (trace_register_changes): Add void parameter type.

sim/rx/fpu.c

@@ -354,7 +354,7 @@ static const char *ex_names[] = {
 /* This checks for all exceptional cases (not all FP exceptions) and
    returns TRUE if it is providing the result in *c.  If it returns
    FALSE, the caller should do the "normal" operation.  */
-int
+static int
 check_exceptions (FP_Parts *a, FP_Parts *b, fp_t *c,
 		  FP_ExceptionCases ex_tab[5][5], 
 		  FP_ExceptionCases *case_ret)

sim/rx/gdb-if.c

@@ -688,7 +688,7 @@ rx_signal_to_gdb_signal (int rx)
 
 /* Take a step return code RC and set up the variables consulted by
    sim_stop_reason appropriately.  */
-void
+static void
 handle_step (int rc)
 {
   if (execution_error_get_last_error () != SIM_ERR_NONE)

sim/rx/mem.c

@@ -262,7 +262,7 @@ mtypec (int address)
 
 #define E() if (trace) e()
 
-void
+static void
 mem_put_byte (unsigned int address, unsigned char value)
 {
   unsigned char *m;