[ARM] pxa: add pxa320 missing pin function for CS2 on GPIO3

Signed-off-by: NDaniel Mack <daniel@caiaq.de>
Signed-off-by: NEric Miao <eric.miao@marvell.com>

arch/arm/mach-pxa/include/mach/mfp-pxa320.h

@@ -38,6 +38,7 @@
 #define GPIO17_2_GPIO		MFP_CFG(GPIO17_2, AF0)
 
 /* Chip Select */
+#define GPIO3_nCS2		MFP_CFG(GPIO3, AF1)
 #define GPIO4_nCS3		MFP_CFG(GPIO4, AF1)
 
 /* AC97 */