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[SYSDATA][GRUB] add CRC-32 implementation

Alessandro Pecugi requested to merge ap/crc32 into scarthgap

The default CRC-32C implementation uses polynomial 0x1edc6f41 and gives a different output than the user space and U-boot SYSDATA utilities which use the 0x04c11db7 polynomial.

Add function grub_getcrc32 which uses 0x04c11db7 and use it from sysdata.

This patch preserves grub_getcrc32c for backward compatibility.

Signed-off-by: Alessandro Pecugi alessandro.pecugi@seco.com

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