[MIPS] Add missing arch defines for the Alchemy MTD driver.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

include/asm-mips/mach-db1x00/db1x00.h

@@ -200,6 +200,12 @@ typedef volatile struct
 			((NAND_T_PUL & 0xF)	<< NAND_T_PUL_SHIFT) | \
 			((NAND_T_SU  & 0xF)	<< NAND_T_SU_SHIFT)  | \
 			((NAND_T_WH  & 0xF)	<< NAND_T_WH_SHIFT)
+#define NAND_CS 1
+
+/* should be done by yamon */
+#define NAND_STCFG  0x00400005 /* 8-bit NAND */
+#define NAND_STTIME 0x00007774 /* valid for 396MHz SD=2 only */
+#define NAND_STADDR 0x12000FFF /* physical address 0x20000000 */
 
 #endif /* __ASM_DB1X00_H */