xfs: Do not name variables "panic"

On platforms that call panic() inside their BUG() macro (m68k/sun3, and
all platforms that don't set HAVE_ARCH_BUG), compilation fails with:

| fs/xfs/support/debug.c: In function ‘xfs_cmn_err’:
| fs/xfs/support/debug.c:92: error: called object ‘panic’ is not a function

as the local variable "panic" conflicts with the "panic()" function.
Rename the local variable to resolve this.

Signed-off-by: Geert Uytterhoeven <[e-mail]>
Reviewed-by: Christoph Hellwig <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

fs/xfs/support/debug.c

···
 {
 	struct va_format	vaf;
 	va_list			args;
-	int			panic = 0;
+	int			do_panic = 0;
 
 	if (xfs_panic_mask && (xfs_panic_mask & panic_tag)) {
 		printk(KERN_ALERT "XFS: Transforming an alert into a BUG.");
-		panic = 1;
+		do_panic = 1;
 	}
 
 	va_start(args, fmt);
···
 	printk(KERN_ALERT "Filesystem %s: %pV", mp->m_fsname, &vaf);
 	va_end(args);
 
-	BUG_ON(panic);
+	BUG_ON(do_panic);
 }
 
 void