ARM: i.MX: mx21ads: Cleanup board
ARM: i.MX: mx21ads: Cleanup board

- Remove unused <asm/mach/time.h> inclusion.
- Use predefined constant for CS8900A base address.
- Use DEFINE_RES_MEM() macro for NOR flash resource.

Signed-off-by: Alexander Shiyan <2d24902f83da69c248f5b0282406fefa25814305@mail.ru>
Signed-off-by: Shawn Guo <912cf7eb7d8018e2943586ae6657d21fd4e38239@linaro.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs