Add programmer-specific delay functions

Add external programmer delay functions so external programmers can
handle the delay on their own if needed.

Corresponding to flashrom svn r578.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Urja Rannikko <urjaman@gmail.com>
diff --git a/ichspi.c b/ichspi.c
index 8f8d6e6..4f83908 100644
--- a/ichspi.c
+++ b/ichspi.c
@@ -453,7 +453,7 @@
 	/* wait for cycle complete */
 	timeout = 100 * 1000 * 60;	// 60s is a looong timeout.
 	while (((REGREAD16(ICH7_REG_SPIS) & SPIS_CDS) == 0) && --timeout) {
-		myusec_delay(10);
+		programmer_delay(10);
 	}
 	if (!timeout) {
 		printf_debug("timeout\n");
@@ -570,7 +570,7 @@
 	/*wait for cycle complete */
 	timeout = 100 * 1000 * 60;	// 60s is a looong timeout.
 	while (((REGREAD32(ICH9_REG_SSFS) & SSFS_CDS) == 0) && --timeout) {
-		myusec_delay(10);
+		programmer_delay(10);
 	}
 	if (!timeout) {
 		printf_debug("timeout\n");