board_f: Move sram bdinfo assignments to generic code

Move sram related bdinfo from arch-specific setup_board_part1 to generic
code in setup_bdinfo. Also use "if (IS_ENABLED(CONFIG_SYS_HAS_SRAM))"
instead of "#ifdef CONFIG_SYS_SRAM_BASE".

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Ovidiu Panait <ovidiu.panait@windriver.com>