Add Cubox-i and Hummingboard variants for v1.5 SOMs, where the SOM has
eMMC fitted.
Signed-off-by: NRussell King <rmk+kernel@armlinux.org.uk>
Reviewed-by: NFabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>