MIPS: OCTEON: Delete unused COP2 saving code

MIPS: OCTEON: Delete unused COP2 saving code

Commit 2c952e06e4f5 ("MIPS: Move cop2 save/restore to switch_to()")
removes assembler code to store COP2 registers.  Commit
a36d8225bceb ("MIPS: OCTEON: Enable use of FPU") mistakenly
restores it

Fixes: a36d8225bceb ("MIPS: OCTEON: Enable use of FPU")
Signed-off-by: Aleksey Makarov <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: David Daney <[email protected]>
Patchwork: https://patchwork.linux-mips.org/patch/8937/
Signed-off-by: Ralf Baechle <[email protected]>