pppx(4): rwsleep(9) -> rwsleep_nsec(9)

[Scott Cheloha]

Infinite sleep, trivial.

ok?

Index: net/if_pppx.c
===================================================================
RCS file: /cvs/src/sys/net/if_pppx.c,v
retrieving revision 1.74
diff -u -p -r1.74 if_pppx.c
--- net/if_pppx.c       28 Jan 2020 16:26:09 -0000      1.74
+++ net/if_pppx.c       18 Feb 2020 00:35:08 -0000
@@ -295,8 +295,8 @@ pppxread(dev_t dev, struct uio *uio, int
 
                NET_LOCK();
                pxd->pxd_waiting = 1;
-               error = rwsleep(pxd, &netlock,
-                   (PZERO + 1)|PCATCH, "pppxread", 0);
+               error = rwsleep_nsec(pxd, &netlock,
+                   (PZERO + 1)|PCATCH, "pppxread", INFSLP);
                NET_UNLOCK();
                if (error != 0) {
                        return (error);