powerpc/ppc64: Print CPU/MMU/FW features at boot
"Helps debug funky firmware issues".
After:
Starting Linux PPC64 #108 SMP Wed Aug 6 19:04:51 EST 2014
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ppc64_pft_size = 0x1a
phys_mem_size = 0x200000000
cpu_features = 0x17fc7a6c18500249
possible = 0x1fffffff18700649
always = 0x0000000000000040
cpu_user_features = 0xdc0065c2 0xee000000
mmu_features = 0x5a000001
firmware_features = 0x00000001405a440b
htab_hash_mask = 0x7ffff
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Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>