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 <[e-mail]>
Acked-by: Giovanni Cabiddu <[e-mail]>
Signed-off-by: Herbert Xu <[e-mail]>

drivers/crypto/qat/qat_common/qat_uclo.c

···
 	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)
 {