[ARM] pxa: move pxa2xx chip selects definitions out of pxa-regs.h

The definitions of PXA_CS<x>_PHYS are really PXA2xx specific and should
be moved out of pxa-regs.h. As an illustration, the PXA3xx static chip
selects definitions are added into pxa3xx-regs.h.

Signed-off-by: Eric Miao <eric.miao@marvell.com>
diff --git a/drivers/mtd/nand/cmx270_nand.c b/drivers/mtd/nand/cmx270_nand.c
index fa129c0..10081e6 100644
--- a/drivers/mtd/nand/cmx270_nand.c
+++ b/drivers/mtd/nand/cmx270_nand.c
@@ -26,8 +26,7 @@
 #include <asm/irq.h>
 #include <asm/mach-types.h>
 
-#include <mach/hardware.h>
-#include <mach/pxa-regs.h>
+#include <mach/pxa2xx-regs.h>
 
 #define GPIO_NAND_CS	(11)
 #define GPIO_NAND_RB	(89)