spl: introduce SPL_XIP to config
U-Boot and SPL don't necessary share the same location, so we might end with U-Boot SPL in read-only memory (XIP) and U-Boot in read-write memory. In case of non XIP boot mode, we rely on such variables as "hart_lottery" and "available_harts_lock" which we use as atomics. The problem is that CONFIG_XIP also propagate to main U-Boot, not only SPL, so we need CONFIG_SPL_XIP to distinguish SPL XIP from other XIP modes. This adds an option special for SPL to behave it in XIP manner and we don't use hart_lottery and available_harts_lock, during start proccess. Signed-off-by:Nikita Shubin <n.shubin@yadro.com> Reviewed-by:
Rick Chen <rick@andestech.com>
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