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2024-07-04drivers: serial: Add xtensa semihosting driverJiaxun Yang
Add xtensa semihosting driver. It can't use regular semihosting driver as Xtensa's has it's own semihosting ABI. Tested-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>