Revert "asmc: fix asmc_key_dump() page fault on T2 MMIO backend"

This reverts commit 3abc07947c.

I'm not sure how this built locally for me but obviously failed
in CI; I'll go figure that out with the submitter and come back.

sys/dev/asmc/asmc.c

@@ -45,7 +45,6 @@
 #include <sys/malloc.h>
 #include <sys/module.h>
 #include <sys/mutex.h>
-#include <sys/sbuf.h>
 #include <sys/sysctl.h>
 #include <sys/systm.h>
 #include <sys/taskqueue.h>
@@ -1091,27 +1090,6 @@ asmc_key_dump(device_t dev, int number)
 	uint8_t maxlen;
 	int i, error = 1, try = 0;
 
-	if (sc->sc_is_mmio) {
-		uint8_t len = 0;
-		char mmio_type[ASMC_TYPELEN + 1] = { 0 };
-		if (asmc_key_dump_by_index(dev, number, key, mmio_type, &len))
-			return (1);
-		memset(v, 0, sizeof(v));
-		len = MIN(len, sizeof(v));
-		asmc_key_read(dev, key, v, len);
-		struct sbuf sb;
-		char buf[128];
-		sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN);
-		sbuf_printf(&sb, "key %d: %s, type %s (len %d), data",
-		    number, key, mmio_type, len);
-		for (i = 0; i < len; i++)
-			sbuf_printf(&sb, " %02x", v[i]);
-		sbuf_finish(&sb);
-		device_printf(dev, "%s\n", sbuf_data(&sb));
-		sbuf_delete(&sb);
-		return (0);
-	}
-
 	mtx_lock_spin(&sc->sc_mtx);
 
 	index[0] = (number >> 24) & 0xff;
@@ -1172,23 +1150,19 @@ asmc_key_dump(device_t dev, int number)
 	maxlen = type[0];
 	type[0] = ' ';
 	type[5] = '\0';
-	maxlen = MIN(maxlen, sizeof(v));
+	if (maxlen > sizeof(v))
+		maxlen = sizeof(v);
 
 	memset(v, 0, sizeof(v));
 	error = asmc_key_read(dev, key, v, maxlen);
 	if (error)
 		return (error);
 
-	struct sbuf sb;
-	char buf[128];
-	sbuf_new(&sb, buf, sizeof(buf), SBUF_FIXEDLEN);
-	sbuf_printf(&sb, "key %d: %s, type%s (len %d), data",
+	device_printf(dev, "key %d: %s, type%s (len %d), data",
 	    number, key, type, maxlen);
 	for (i = 0; i < maxlen; i++)
-		sbuf_printf(&sb, " %02x", v[i]);
-	sbuf_finish(&sb);
-	device_printf(dev, "%s\n", sbuf_data(&sb));
-	sbuf_delete(&sb);
+		printf(" %02x", v[i]);
+	printf("\n");
 
 	return (0);
 }