macros: Add BIN() macro

Signed-off-by: Andrew Andrianov <andrew@ncrmnt.org>
printk: minor adjustments

Signed-off-by: Andrew Andrianov <andrew@ncrmnt.org>
lib: Add nrf24l01 device driver

Signed-off-by: Andrew Andrianov <andrew@ncrmnt.org>
scripts: Add checkpatch & cleanfile scripts from Linux

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