add gpio led uart

hc

2024-05-10 748e4f3d702def1a4bff191e0cf93b6a05340f01

 kernel/arch/xtensa/include/asm/tlbflush.h
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@@ -160,9 +160,6 @@
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 		invalidate_dtlb_entry(tlb_entry);
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 }
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-#define check_pgt_cache()	do { } while (0)
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-
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-
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 /*
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  * DO NOT USE THESE FUNCTIONS.  These instructions aren't part of the Xtensa
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  * ISA and exist only for test purposes..