Hardcoded pin maps do not make sense with additional HW support.
Allows tracing of a single pin in another tracing module, for example
for tracing the SPI cs pin.
Signed-off-by: Janne Grunau <j@jannau.net>
The hanlder omits noise/useless of the mmio access and annotates
known offsets, pins, interrupts and config values.
Signed-off-by: Janne Grunau <j@jannau.net>