decnet: Reduce switch/case indent

Make the case labels the same indent as the switch.

git diff -w shows differences for line wrapping.
(fit multiple lines to 80 columns, join where possible)

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/decnet/sysctl_net_decnet.c

@@ -68,14 +68,15 @@ static struct ctl_table_header *dn_table_header = NULL;
 static void strip_it(char *str)
 {
 	for(;;) {
-		switch(*str) {
-			case ' ':
-			case '\n':
-			case '\r':
-			case ':':
-				*str = 0;
-			case 0:
-				return;
+		switch (*str) {
+		case ' ':
+		case '\n':
+		case '\r':
+		case ':':
+			*str = 0;
+			/* Fallthrough */
+		case 0:
+			return;
 		}
 		str++;
 	}