earlycon: _IONBF in newlib glue

Signed-off-by: Andrew 'Necromant' Andrianov <andrew@ncrmnt.org>
earlycon: Initial STM32F1X serial backend draft

Signed-off-by: Andrew 'Necromant' Andrianov <andrew@ncrmnt.org>
panic: Fix a typo

Signed-off-by: Andrew 'Necromant' Andrianov <andrew@ncrmnt.org>
spisd: Implement reading CID/CSD

Signed-off-by: Andrew 'Necromant' Andrianov <andrew@ncrmnt.org>
stlinky: Write new accepts const char*

Signed-off-by: Andrew 'Necromant' Andrianov <andrew@ncrmnt.org>