ARC: Allow conditional multiple inclusion of uapi/asm/unistd.h
Commit 97bc386f "ARC: Add guard macro to uapi/asm/unistd.h" inhibited multiple inclusion of ARCH unistd.h. This however hosed the system since Generic syscall table generator relies on it being included twice, and in lack-of an empty table was emitted by C preprocessor. Fix that by allowing one exception to rule for the special case (just like Xtensa) Suggested-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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