rockchip: Don't clear the reset status reg
reset reason can be used several stages of U-Boot bootloader like SPL, U-Boot proper based on the requirements. Clearing the status register end of get_reset_cause will end up showing the wrong reset cause when it read the second time. For example, if board resets, SPL reads the reset status as RST whereas U-Boot proper reads the status as POR. However, based on the latest testing clearing reset status won't be required for determine the last reset cause or following resets. Signed-off-by: NJagan Teki <jagan@amarulasolutions.com> Reviewed-by: NKever Yang <kever.yang@rock-chips.com>
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