imx: iomux: add macros to setup iomux for multiple SoC types

imx: iomux: add macros to setup iomux for multiple SoC types

Allow imx_iomux_v3_setup_multiple_pads to take a multi-cpu pad_list
and add macros for declaring the pad_list that take into account the
SoC types supported using CONFIG_MX6QDL (supports both the MX6Q and MX6DL
iomux).

Cc: Stefan Roese <[email protected]>
Cc: Otavio Salvador <[email protected]>
Cc: Andy Ng <[email protected]>
Cc: Eric Nelson <[email protected]>
Cc: Tapani Utriainen <[email protected]>
Cc: Tom Rini <[email protected]>
Signed-off-by: Tim Harvey <[email protected]>