isiot: Fix to use usdhc2_pads for mmc2

mmc2 in Is.IoT using usdhc1_pads instead usdhc2_pads,
so update the same.

Cc: Stefano Babic <sbabic@denx.de>
Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
1 file changed