staging: mt7621-pci: remove 'RALINK_PCI_IMBASEBAR0_ADDR' register

Register 'RALINK_PCI_IMBASEBAR0_ADDR' contains internal memory
base address for BAR0. We don't really need to write anything
there at all since its initial value contains always a desired
valid value. Hence remove register definition and related code.

Signed-off-by: Sergio Paracuellos <sergio.paracuellos@gmail.com>
Link: https://lore.kernel.org/r/20201123093637.8300-8-sergio.paracuellos@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>