Usleep() is not found in all versions of MinGW, use Sleep() on Windows

Handle long sleeps on non-Windows correctly.

Corresponding to flashrom svn r1667.
Signed-off-by: Maksim Kuleshov <mmcx@mail.ru>
Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>

buspirate_spi.c

@@ -286,7 +286,7 @@ int buspirate_spi_init(void)
 		/* The Bus Pirate can't handle UART input buffer overflow in BBIO mode, and sending a sequence
 		 * of 0x00 too fast apparently triggers such an UART input buffer overflow.
 		 */
-		usleep(10000);
+		internal_sleep(10000);
 	}
 	/* We know that 20 commands of \0 should elicit at least one BBIO1 response. */
 	if ((ret = buspirate_wait_for_string(bp_commbuf, "BBIO")))

programmer.h

@@ -250,6 +250,7 @@ extern const struct board_info laptops_known[];
 /* udelay.c */
 void myusec_delay(int usecs);
 void myusec_calibrate_delay(void);
+void internal_sleep(int usecs);
 void internal_delay(int usecs);
 
 #if CONFIG_INTERNAL == 1

udelay.c

@@ -169,13 +169,23 @@ recalibrate:
 	msg_pinfo("OK.\n");
 }
 
+/* Not very precise sleep. */
+void internal_sleep(int usecs)
+{
+#ifdef _WIN32
+	Sleep((usecs + 999) / 1000);
+#else
+	sleep(usecs / 1000000);
+	usleep(usecs % 1000000);
+#endif
+}
+
+/* Precise delay. */
 void internal_delay(int usecs)
 {
-	/* If the delay is >1 s, use usleep because timing does not need to
-	 * be so precise.
-	 */
+	/* If the delay is >1 s, use internal_sleep because timing does not need to be so precise. */
 	if (usecs > 1000000) {
-		usleep(usecs);
+		internal_sleep(usecs);
 	} else {
 		myusec_delay(usecs);
 	}