Return on non-fatal condition prematurely

There is still useful information to be gained from -V being passed such
as GPIO mapping and what flash chip was found behind an SPI programmer
behind registered.

Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
sb600spi: Bump chipset rev 0x15->0x16 for 1022:780e

Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Whitelist Lenovo G505s

Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>