nvme-fabrics: use unsigned int type

Loop variable i will never have a negative value, so use
unsigned int type instaed of int.

Signed-off-by: Chaitanya Kulkarni <[e-mail]>
Signed-off-by: Christoph Hellwig <[e-mail]>

drivers/nvme/host/fabrics.c

···
 		unsigned int allowed_opts)
 {
 	if (opts->mask & ~allowed_opts) {
-		int i;
+		unsigned int i;
 
 		for (i = 0; i < ARRAY_SIZE(opt_tokens); i++) {
 			if ((opt_tokens[i].token & opts->mask) &&