Standardize on using __func__ instead of __FUNCTION__

The __func__ variant is standardized in C99 and recommended to be
used instead of __FUNCTION__ in the gcc info page.

Only _very_ old versions of gcc did not know about __func__, but we've
been using both __func__ and __FUNCTION__ for a long while now, and
nobody complained about this, so all our users seem to use recent
enough compilers.

Corresponding to flashrom svn r711.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Stefan Reinauer <stepan@coresystems.de>
diff --git a/jedec.c b/jedec.c
index 0e426d6..d51f122 100644
--- a/jedec.c
+++ b/jedec.c
@@ -145,7 +145,7 @@
 	chip_writeb(0xF0, bios + 0x5555);
 	programmer_delay(probe_timing_exit);
 
-	printf_debug("%s: id1 0x%02x, id2 0x%02x", __FUNCTION__, largeid1, largeid2);
+	printf_debug("%s: id1 0x%02x, id2 0x%02x", __func__, largeid1, largeid2);
 	if (!oddparity(id1))
 		printf_debug(", id1 parity violation");