High Baud Rate UART Configuration

Hi,

It is defined in kernel source code header file:
…/dt-bindings/clock/tegra186-clock.h
#define TEGRA186_CLK_PLLC4_OUT2 278
So hex value is 116

Please try changing clocks :
clocks = <0xd 0xd7 0xd 0x116>;

Thanks,
Shubhi