Fix sparse warning: Unknown escape %

This patch fixes wrong escaping of %.
In print.c %%2b is correct instead of \%2b ("%%2b"=%2b=+)
In board_enable.c %d is correct instead of \%d.

Corresponding to flashrom svn r1256.
Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Acked-by: Stefan Reinauer <stepan@coreboot.org>

board_enable.c

@@ -1135,7 +1135,7 @@ static int intel_piix4_gpo_set(unsigned int gpo, int raise)
 
 	if ( (((1 << gpo) & nonmuxed_gpos) == 0) &&
 	     (pci_read_word(dev, piix4_gpo[gpo].reg) & piix4_gpo[gpo].mask) != piix4_gpo[gpo].value ) {
-	  msg_perr("\nERROR: PIIX4 GPO\%d not programmed for output.\n", gpo);
+	  msg_perr("\nERROR: PIIX4 GPO%d not programmed for output.\n", gpo);
 	  return -1;
 	}
 

print.c

@@ -355,7 +355,7 @@ const struct board_info boards_known[] = {
 	B("ASRock",	"775i65G",		1, "http://www.asrock.com/mb/overview.asp?Model=775i65G", NULL),
 	B("ASRock",	"939A785GMH/128M",	1, "http://www.asrock.com/mb/overview.asp?Model=939A785GMH/128M&s=939", NULL),
 	B("ASRock",	"A330GC",		1, "http://www.asrock.com/mb/overview.asp?Model=A330GC", NULL),
-	B("ASRock",	"A770CrossFire",	1, "http://www.asrock.com/mb/overview.asp?Model=A770CrossFire&s=AM2\%2b", NULL),
+	B("ASRock",	"A770CrossFire",	1, "http://www.asrock.com/mb/overview.asp?Model=A770CrossFire&s=AM2%%2b", NULL),
 	B("ASRock",	"ALiveNF6G-DVI",	1, "http://www.asrock.com/mb/overview.asp?Model=ALiveNF6G-DVI", NULL),
 	B("ASRock",	"K7S41",		1, "http://www.asrock.com/mb/overview.asp?Model=K7S41", NULL),
 	B("ASRock",	"K7VT4A+",		0, "http://www.asrock.com/mb/overview.asp?Model=K7VT4A%%2b&s=", "No chip found, probably due to flash translation. http://www.flashrom.org/pipermail/flashrom/2009-August/000393.html"),