Kill off cpu_state_reset()

Kill off cpu_state_reset()

In commit 1bba0dc932e8826a7d030df3767daf0bc339f9a2 cpu_reset()
was renamed to cpu_state_reset(), to allow introducing a new cpu_reset()
that would operate on QOM objects.

All callers have been updated except for one in target-mips, so drop all
implementations except for the one in target-mips and move the
declaration there until MIPSCPU reset can be fully QOM'ified.

Signed-off-by: Andreas Färber <[email protected]>
Acked-by: Michael Walle <[email protected]> (for lm32)
Acked-by: Max Filippov <[email protected]> (for xtensa)
Acked-by: Edgar E. Iglesias <[email protected]> (for mb + cris)
Acked-by: Alexander Graf <[email protected]> (for ppc)
Acked-by: Blue Swirl <[email protected]>