Increase the time we spend waiting for the controller to become ready to

accept a new command; in high load cases it may be too busy for the old
value.

This loop needs something to tie it to real time, rather than just the CPU's
ability to fetch from the L1 data cache, but this hack works for now.

Approved by:	jkh

sys/dev/amr/amr.c

@@ -1126,7 +1126,7 @@ amr_start(struct amr_command *ac)
 
     /* spin waiting for the mailbox */
     debug("wait for mailbox");
-    for (i = 10000, done = 0, worked = 0; (i > 0) && !done; i--) {
+    for (i = 100000, done = 0, worked = 0; (i > 0) && !done; i--) {
 	s = splbio();
 	
 	/* is the mailbox free? */