Fix code-style

Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
diff --git a/library/pkcs7.c b/library/pkcs7.c
index 63ad71f..4fdbe36 100644
--- a/library/pkcs7.c
+++ b/library/pkcs7.c
@@ -494,7 +494,10 @@
 
     if (p != end_content_info) {
         /* Determine if valid content is present */
-        ret = mbedtls_asn1_get_tag(&p, end_content_info, &len, MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_CONTEXT_SPECIFIC);
+        ret = mbedtls_asn1_get_tag(&p,
+                                   end_content_info,
+                                   &len,
+                                   MBEDTLS_ASN1_CONSTRUCTED | MBEDTLS_ASN1_CONTEXT_SPECIFIC);
         if (ret != 0) {
             return MBEDTLS_ERROR_ADD(MBEDTLS_ERR_PKCS7_INVALID_CONTENT_INFO, ret);
         }