linux_spi: Fix conversion from kHz to Hz

A kilohertz is exactly 1000 hertz, not 1024 hertz.

Corresponding to flashrom svn r1768.
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
Acked-by: Stefan Tauner <stefan.tauner@alumni.tuwien.ac.at>

linux_spi.c

@@ -68,7 +68,7 @@ int linux_spi_init(void)
 
 	p = extract_programmer_param("spispeed");
 	if (p && strlen(p)) {
-		speed = (uint32_t)strtoul(p, &endp, 10) * 1024;
+		speed = (uint32_t)strtoul(p, &endp, 10) * 1000;
 		if (p == endp) {
 			msg_perr("%s: invalid clock: %s kHz\n", __func__, p);
 			free(p);