module: do not binary-search in __ksymtab_gpl if fsa->gplok is false

Currently, !fsa->gplok && syms->license == GPL_ONLY) is checked after
bsearch() succeeds.

It is meaningless to do the binary search in the GPL symbol table when
fsa->gplok is false because we know find_exported_symbol_in_section()
will fail anyway.

This check should be done before bsearch().

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>