sf: move useful messages from debug to printf

At the moment, the default SPI flash subsystem is quite terse.  Errors and
successes both result in a generic message.  So move the useful errors and
useful successes to printf output by default.

While we're here, also convert the messages to use print_size().

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/drivers/mtd/spi/sst.c b/drivers/mtd/spi/sst.c
index 50e9299..2557891 100644
--- a/drivers/mtd/spi/sst.c
+++ b/drivers/mtd/spi/sst.c
@@ -364,8 +364,9 @@
 	stm->flash.read = sst_read_fast;
 	stm->flash.size = SST_SECTOR_SIZE * params->nr_sectors;
 
-	debug("SF: Detected %s with page size %u, total %u bytes\n",
-	      params->name, SST_SECTOR_SIZE, stm->flash.size);
+	printf("SF: Detected %s with page size %u, total ",
+	       params->name, SST_SECTOR_SIZE);
+	print_size(stm->flash.size, "\n");
 
 	/* Flash powers up read-only, so clear BP# bits */
 	sst_unlock(&stm->flash);