[ARM] pxa: mmc: add 3rd host controller support for pxa310

This patch is to add the third mmc controller support _only_
for pxa310.

On zylonite, the third controller support one slot.

Signed-off-by: Bridge Wu <bridge.wu@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/mach-pxa/zylonite.c

@@ -29,7 +29,7 @@
 
 #include "generic.h"
 
-#define MAX_SLOTS	2
+#define MAX_SLOTS	3
 struct platform_mmc_slot zylonite_mmc_slot[MAX_SLOTS];
 
 int gpio_backlight;
@@ -242,6 +242,8 @@ static void __init zylonite_init_mmc(void)
 {
 	pxa_set_mci_info(&zylonite_mci_platform_data);
 	pxa3xx_set_mci2_info(&zylonite_mci2_platform_data);
+	if (cpu_is_pxa310())
+		pxa3xx_set_mci3_info(&zylonite_mci_platform_data);
 }
 #else
 static inline void zylonite_init_mmc(void) {}