[GIT PULL] csky fixes for v5.15-rc6

Hi Linus:

The following changes since commit e21e52ad1e0126e2a5e2013084ac3f47cf1e887a:

  csky: Make HAVE_TCM depend on !COMPILE_TEST (2021-10-16 07:20:12 +0800)

are available in the Git repository at:

  https://github.com/c-sky/csky-linux.git tags/csky-for-linus-5.15-rc6

for you to fetch changes up to e21e52ad1e0126e2a5e2013084ac3f47cf1e887a:

  csky: Make HAVE_TCM depend on !COMPILE_TEST (2021-10-16 07:20:12 +0800)

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csky updates for 5.15-rc6

Only 5 fixups:
 - Make HAVE_TCM depend on !COMPILE_TEST
 - bitops: Remove duplicate __clear_bit define
 - Select ARCH_WANT_FRAME_POINTERS only if compiler supports it
 - Fixup regs.sr broken in ptrace
 - don't let sigreturn play with priveleged bits of status register

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