Rename the gpmi_apb_bch clock name to gpmi_bch_apb, as you can find in
the device tree.
Fixes: commit a59691280daca ("MXS_NAND: Add clock support for iMX8")
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Michael Trimarchi <michael@amarulasolutions.com>