UPSTREAM: modules: mark find_symbol static

find_symbol is only used in module.c.

Bug: 157965270
Bug: 171277690
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jessica Yu <jeyu@kernel.org>
(cherry picked from commit 773110470e2fa3839523384ae014f8a723c4d178)
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: Ifd34f7a477be9ed1b7715ce966473f2898c5a975
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>