tty: hvc-iucv: Remove KMSG_COMPONENT macro

The KMSG_COMPONENT macro is a leftover of the s390 specific "kernel message
catalog" from 2008 [1] which never made it upstream.

The macro was added to s390 code to allow for an out-of-tree patch which
used this to generate unique message ids. Also this out-of-tree doesn't
exist anymore.

Remove the macro in order to get rid of a pointless indirection.

[1] https://lwn.net/Articles/292650/

Acked-by: Hendrik Brueckner <brueckner@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Link: https://patch.msgid.link/20251126142909.2140015-1-hca@linux.ibm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: hcahca

drivers/tty/hvc/hvc_iucv.c

@@ -9,8 +9,7 @@
  *
  * Author(s):	Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
  */
-#define KMSG_COMPONENT		"hvc_iucv"
-#define pr_fmt(fmt)		KMSG_COMPONENT ": " fmt
+#define pr_fmt(fmt) "hvc_iucv: " fmt
 
 #include <linux/types.h>
 #include <linux/slab.h>
@@ -1344,7 +1343,7 @@ static int __init hvc_iucv_init(void)
 		}
 	}
 
-	hvc_iucv_buffer_cache = kmem_cache_create(KMSG_COMPONENT,
+	hvc_iucv_buffer_cache = kmem_cache_create("hvc_iucv",
 					   sizeof(struct iucv_tty_buffer),
 					   0, 0, NULL);
 	if (!hvc_iucv_buffer_cache) {