Stop-A printk cleanup

This patch is incredibly trivial, but it does resolve some of the user confusion as to what "L1-A" actually is.

Clarify printk message to refer to Stop-A (L1-A).

Gentoo has a virtually identical patch in their kernel sources.

~spot
---
Tom "spot" Callaway: Red Hat Sales Engineer || GPG Fingerprint: 93054260 Fedora Extras Steering Committee Member (RPM Standards and Practices) Aurora Linux Project Leader: http://auroralinux.org
Lemurs, llamas, and sparcs, oh my!

@@ -105,9 +105,9 @@ NORET_TYPE void panic(const char * fmt, 
 #ifdef __sparc__
 	{
 		extern int stop_a_enabled;
-		/* Make sure the user can actually press L1-A */
+		/* Make sure the user can actually press Stop-A (L1-A) */
 		stop_a_enabled = 1;
-		printk(KERN_EMERG "Press L1-A to return to the boot prom\n");
+		printk(KERN_EMERG "Press Stop-A (L1-A) to return to the boot prom\n");
 	}
 #endif
 #if defined(CONFIG_ARCH_S390)