usb: gadget: tegra-xudc: Do not program SPARAM

According to the Tegra Technical Reference Manual, SPARAM
is a read-only register and should not be programmed in
the driver.

The change removes the wrong SPARAM usage.

Signed-off-by: Wayne Chang <waynec@nvidia.com>
Link: https://lore.kernel.org/r/20220107090443.149021-1-waynec@nvidia.com


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