init: use pr_cont() when displaying rotator during ramdisk loading.

Otherwise each individual rotator char would be printed in a new line:

(...)
[    0.642350] -
[    0.644374] |
[    0.646367] -
(...)

Signed-off-by: Nicolas Schichan <nicolas.schichan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c
index 8a09b32..dd4104c 100644
--- a/init/do_mounts_rd.c
+++ b/init/do_mounts_rd.c
@@ -272,7 +272,7 @@
 		sys_write(out_fd, buf, BLOCK_SIZE);
 #if !defined(CONFIG_S390)
 		if (!(i % 16)) {
-			printk("%c\b", rotator[rotate & 0x3]);
+			pr_cont("%c\b", rotator[rotate & 0x3]);
 			rotate++;
 		}
 #endif