ppc/mac: Advertise a high clock frequency for NewWorld Macs

We use 900Mhz, otherwise MacOS X 10.5 refuses to install.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

hw/ppc/mac_newworld.c

@@ -77,7 +77,7 @@
 #define MAX_IDE_BUS 2
 #define CFG_ADDR 0xf0000510
 #define TBFREQ (100UL * 1000UL * 1000UL)
-#define CLOCKFREQ (266UL * 1000UL * 1000UL)
+#define CLOCKFREQ (900UL * 1000UL * 1000UL)
 #define BUSFREQ (100UL * 1000UL * 1000UL)
 
 #define NDRV_VGA_FILENAME "qemu_vga.ndrv"