Use the EOR3 instruction to implement xor_blocks() if the instruction is
available, which is the case if the CPU implements the SHA-3 extension.
This is about 20% faster on Apple M1 when using the 5-way version.
Signed-off-by: NArd Biesheuvel <ardb@kernel.org>
Link: https://lore.kernel.org/r/20211213140252.2856053-1-ardb@kernel.orgSigned-off-by: NCatalin Marinas <catalin.marinas@arm.com>