initramfs: prevent initramfs printk message being split by messages from other code.

initramfs uses printk without a linefeed, then does some work, then uses
printk to finish the message off.  However if some other code does a
printk in between, then the messages get mixed together.  Better for each
message to be an independent line...

Example of problem that this fixes:

    checking if image is initramfs...<7>Switched to high resolution mode on CPU 1
    Switched to high resolution mode on CPU 0
    it is
Signed-off-by: Simon Kitching <skitching@apache.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

init/initramfs.c

@@ -571,11 +571,11 @@ static int __init populate_rootfs(void)
 	if (initrd_start) {
 #ifdef CONFIG_BLK_DEV_RAM
 		int fd;
-		printk(KERN_INFO "checking if image is initramfs...");
+		printk(KERN_INFO "checking if image is initramfs...\n");
 		err = unpack_to_rootfs((char *)initrd_start,
 			initrd_end - initrd_start);
 		if (!err) {
-			printk(" it is\n");
+			printk(KERN_INFO "rootfs image is initramfs; unpacking...\n");
 			free_initrd();
 			return 0;
 		} else {
@@ -583,7 +583,8 @@ static int __init populate_rootfs(void)
 			unpack_to_rootfs(__initramfs_start,
 				 __initramfs_end - __initramfs_start);
 		}
-		printk("it isn't (%s); looks like an initrd\n", err);
+		printk(KERN_INFO "rootfs image is not initramfs (%s)"
+				"; looks like an initrd\n", err);
 		fd = sys_open("/initrd.image", O_WRONLY|O_CREAT, 0700);
 		if (fd >= 0) {
 			sys_write(fd, (char *)initrd_start,