target-ppc: Fix popcntb Opcode Bug

The popcntb instruction is erroneously encoded with opcode extension (opc1,opc2) = (0x03,0x03).
Bits 21-30 of popcntb are 122 = 0b00011-0b11010 and therefore this should be encoded
as (opc1,opc2) = (0x1A, 0x03).

Signed-off-by: Tom Musta <tommusta@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
macio ide: Do remainder access asynchronously

The macio IDE controller has some pretty nasty magic in its implementation to
allow for unaligned sector accesses. We used to handle these accesses
synchronously inside the IO callback handler.

However, the block infrastructure changed below our feet and now it's impossible
to call a synchronous block read/write from the aio callback handler of a
previous block access.

Work around that limitation by making the unaligned handling bits also go
through our asynchronous handler.

This fixes booting Mac OS X for me.

Reported-by: John Arbuckle <programmingkidx@gmail.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
macio: Fix timer endianness

The timer registers on our KeyLargo macio emulation are read as byte reversed
from the big endian guest, so we better expose them endian reversed as well.

This fixes initial hickups of booting Mac OS X with -M mac99 for me.

Signed-off-by: Alexander Graf <agraf@suse.de>