make IPL levels consistent in src/sys/crypto/crypto.c

[David Gwynne]

everything else in crypto is protected at IPL_VM (via splvm), i
cant see a reason for the taskq to be different. ive read all the
users of the crypto api and theyre all at or below IPL_VM.

can someone test this with ipsec or softraid crypto?

cheers,
dlg

Index: crypto.c
===================================================================
RCS file: /cvs/src/sys/crypto/crypto.c,v
retrieving revision 1.67
diff -u -p -r1.67 crypto.c
--- crypto.c    14 Sep 2014 14:17:23 -0000      1.67
+++ crypto.c    17 Oct 2014 04:14:17 -0000
@@ -511,7 +511,7 @@ crypto_getreq(int num)
 void
 crypto_init(void)
 {
-       crypto_taskq = taskq_create("crypto", 1, IPL_HIGH);
+       crypto_taskq = taskq_create("crypto", 1, IPL_VM);
 
        pool_init(&cryptop_pool, sizeof(struct cryptop), 0, 0,
            0, "cryptop", NULL);