staging: rtl8192u: replace __FUNCTION__ in r819xU_phy.c

This patch fixes the following checkpatch warning:
WARNING: __func__ should be used instead of gcc specific __FUNCTION__

Signed-off-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
1 file changed