kprobes/parisc: remove arch_kprobe_on_func_entry()

The common kprobes provides a weak implementation of
arch_kprobe_on_func_entry(). The parisc version is the same as the
common version, so remove it.

Signed-off-by: Jisheng Zhang <Jisheng.Zhang@synaptics.com>
Acked-by: Sven Schnelle <svens@stackframe.org>
Signed-off-by: Helge Deller <deller@gmx.de>