crypto: qat - Fix unsigned function returning negative constant

The function qat_uclo_check_image_compat has an unsigned return type, but
returns a negative constant to indicate an error condition. So we change
unsigned to int.
Signed-off-by: Haowen Bai <baihaowen@meizu.com>
Acked-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

drivers/crypto/qat/qat_common/qat_uclo.c

@@ -519,7 +519,7 @@ qat_uclo_map_chunk(char *buf, struct icp_qat_uof_filehdr *file_hdr,
 	return NULL;
 }
 
-static unsigned int
+static int
 qat_uclo_check_image_compat(struct icp_qat_uof_encap_obj *encap_uof_obj,
 			    struct icp_qat_uof_image *image)
 {