ARM1176: Add basic support for Samsung S3C64xx SoCs

This patch introduces again support for Samsung S3C64xx SoCs. Old and
removed code has been heavily cleaned up and updated to use current
u-boot APIs.

Signed-off-by: Lukasz Majewski <l.majewski@majess.pl>
Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>
board: samsung: Add basic support for SMDK6410 board

This patch introduces basic support for Meritech SMDK6410 board based on
Samsung S3C6410 SoC.

Signed-off-by: Lukasz Majewski <l.majewski@majess.pl>
Signed-off-by: Tomasz Figa <tomasz.figa@gmail.com>