tty: srmcons: make srmcons_do_write() return void

The return value of srmcons_do_write() is ignored as all characters are
pushed. So make srmcons_do_write() to return void.
Signed-off-by: "Jiri Slaby (SUSE)" <jirislaby@kernel.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: linux-alpha@vger.kernel.org
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20231127123713.14504-2-jirislaby@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/alpha/kernel/srmcons.c

@@ -88,7 +88,7 @@ srmcons_receive_chars(struct timer_list *t)
 }
 
 /* called with callback_lock held */
-static int
+static void
 srmcons_do_write(struct tty_port *port, const char *buf, int count)
 {
 	static char str_cr[1] = "\r";
@@ -125,7 +125,6 @@ srmcons_do_write(struct tty_port *port, const char *buf, int count)
 				need_cr = 0;
 		}
 	}
-	return count;
 }
 
 static ssize_t