ARM: tegra: fix "bootp" issue for Tegra124 too

Fix the timeout issue after running "bootp" command in U-Boot console.

TXFIFOTHRES bits of TXFILLTUNING register should be set to 0x10 after a
controller reset and before RUN bit is set (per technical reference
manual).

Signed-off-by: Jim Lin <jilin@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>

include/configs/tegra124-common.h

@@ -78,5 +78,6 @@
 
 /* For USB EHCI controller */
 #define CONFIG_EHCI_IS_TDI
+#define CONFIG_USB_EHCI_TXFIFO_THRESH	0x10
 
 #endif /* _TEGRA124_COMMON_H_ */