powerpc/ebpf32: Rework 64 bits shifts to avoid tests and branches
Re-implement BPF_ALU64 | BPF_{LSH/RSH/ARSH} | BPF_X with branchless implementation copied from misc_32.S. Signed-off-by:Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by:
Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/03167350b05b2fe8b741e53363ee37709d0f878d.1618227846.git.christophe.leroy@csgroup.eu
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