cppcheck: Add suppressions for "logically" exported functions

We have some functions in our headers which are definitely there on
purpose.  However, they're not yet used outside the files in which they're
defined.  That causes sufficiently recent cppcheck versions (2.17) to
complain they should be static.

Suppress the errors for these "logically" exported functions.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>

iov.c

@@ -203,6 +203,7 @@ size_t iov_tail_size(struct iov_tail *tail)
  *	    overruns the IO vector, is not contiguous or doesn't have the
  *	    requested alignment.
  */
+/* cppcheck-suppress [staticFunction,unmatchedSuppression] */
 void *iov_peek_header_(struct iov_tail *tail, size_t len, size_t align)
 {
 	char *p;

log.c

@@ -281,6 +281,7 @@ static void passt_vsyslog(bool newline, int pri, const char *format, va_list ap)
  * @format:	Message
  * @ap:		Variable argument list
  */
+/* cppcheck-suppress [staticFunction,unmatchedSuppression] */
 void vlogmsg(bool newline, bool cont, int pri, const char *format, va_list ap)
 {
 	bool debug_print = (log_mask & LOG_MASK(LOG_DEBUG)) && log_file == -1;