arm, davinci: da850/dm365 lowlevel cleanup

- Cleanup a lot of fix values, and use defines instead.
- Also make some values configurable through the board config
  file.
- delete the NAND_SPL code for da850, as it is not used actually
- remove the asm code

Signed-off-by: Heiko Schocher <hs@denx.de>
Cc: Wolfgang Denk <hs@denx.de>
Cc: Sandeep Paulraj <s-paulraj@ti.com>
Cc: Albert ARIBAUD <albert.u.boot@aribaud.net>
Cc: Tom Rini <tom.rini@gmail.com>
Cc: Christian Riesch <christian.riesch@omicron.at>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/arch/arm/include/asm/arch-davinci/aintc_defs.h b/arch/arm/include/asm/arch-davinci/aintc_defs.h
index 8f37053..38f814c 100644
--- a/arch/arm/include/asm/arch-davinci/aintc_defs.h
+++ b/arch/arm/include/asm/arch-davinci/aintc_defs.h
@@ -47,4 +47,6 @@
 
 #define dv_aintc_regs ((struct dv_aintc_regs *)DAVINCI_ARM_INTC_BASE)
 
+#define DV_AINTC_INTCTL_IDMODE	(1 << 2)
+
 #endif /* _DV_AINTC_DEFS_H_ */