panic: Fix up description of vpanic()

panic: Fix up description of vpanic()

The description above vpanic() has the wrong function name. Fix it up.

Cc: John Ogness <john.ogness@linutronix.de>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: Gabriele Monaco <gmonaco@redhat.com>
Cc: Josh Poimboeuf <jpoimboe@kernel.org>
Cc: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/23a7e8add6546b155371b7e0fbb37bb1def13d6e.1752232374.git.namcao@linutronix.de
Reported-by: Stephen Rothwell <sfr@canb.auug.org.au>
Closes: https://lore.kernel.org/lkml/20250711183802.2d8c124d@canb.auug.org.au/
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Nam Cao <namcao@linutronix.de>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>