ksmbd: Remove unused parameter from smb2_get_name()

The 'share' parameter is no longer used by smb2_get_name() since
commit 265fd199

 ("ksmbd: use LOOKUP_BENEATH to prevent the out of
share access").

Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Marios Makassikis <mmakassikis@freebox.fr>
Signed-off-by: Steve French <stfrench@microsoft.com>