Guo Ren 9e2ca15322 csky: Fixup remove unnecessary save/restore PSR code
All processes' PSR could success from SETUP_MMU, so need set it
in INIT_THREAD again.

And use a3 instead of r7 in __switch_to for code convention.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
2020-05-13 17:55:06 +08:00
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