riscv: asm update for building ubifs

[Ben Dooks]

Fix misisng atomic and test_and_{set,clear}_bit macros to allow
the ubi/ubifs code to be built for riscv. These are fairly simple
but are not being used outside of ubifs on our builds.

Ben Dooks (3):
  riscv: add generic link for <asm/atomic.h>
  riscv: implement local_irq_{save,restore} macros
  riscv: define test_and_{set,clear}_bit in asm/bitops.h

 arch/riscv/include/asm/atomic.h | 14 ++++++++++++++
 arch/riscv/include/asm/bitops.h |  3 +++
 arch/riscv/include/asm/system.h | 15 +++++++++++----
 3 files changed, 28 insertions(+), 4 deletions(-)
 create mode 100644 arch/riscv/include/asm/atomic.h

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2.39.2