add gpio led uart

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2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/arch/arm/kernel/entry-common.S
..
..
@@ -92,7 +92,6 @@
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 	ldr	r1, [tsk, #TI_FLAGS]		@ re-check for syscall tracing
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 	movs	r1, r1, lsl #16
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 	beq	no_work_pending
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-do_slower_path:
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  UNWIND(.fnend		)
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 ENDPROC(ret_fast_syscall)
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