uboot-imx

tegra20: common: fix USB_EHCI_TXFIFO_THRESH value

All other Tegra devices that define USB_EHCI_TXFIFO_THRESH use hex
representation, fix tegra20 to be the same format.

Signed-off-by: Peter Robinson <pbrobinson@gmail.com>
Cc: Tom Warren <twarren@nvidia.com>
Cc: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>