net: ravb: Correct bad check of timestamp control flags

net: ravb: Correct bad check of timestamp control flags

When converting the Renesas network drivers to use flags from enum
hwtstamp_rx_filters to control when to timestamp packages instead of a
driver specific schema with bit-wise flags an error was made.

The bit-wise driver specific flags correct logic to set get_ts was:

  q: RAVB_BE + tstamp_rx_ctrl: 0 => 0
  q: RAVB_NC + tstamp_rx_ctrl: 0 => 0
  q: RAVB_BE + tstamp_rx_ctrl: RAVB_RXTSTAMP_TYPE_V2_L2_EVENT => 0
  q: RAVB_NC + tstamp_rx_ctrl: RAVB_RXTSTAMP_TYPE_V2_L2_EVENT => 1
  q: RAVB_BE + tstamp_rx_ctrl: RAVB_RXTSTAMP_TYPE_ALL => 1
  q: RAVB_NC + tstamp_rx_ctrl: RAVB_RXTSTAMP_TYPE_ALL => 1

The converted logic to use enum flags mapped tstamp_rx_ctrl as

  0 to HWTSTAMP_FILTER_NONE
  RAVB_RXTSTAMP_TYPE_V2_L2_EVENT to HWTSTAMP_FILTER_PTP_V2_L2_EVENT
  RAVB_RXTSTAMP_TYPE_ALL to HWTSTAMP_FILTER_ALL

But the logic was incorrectly changed to:

  q: RAVB_BE + tstamp_rx_ctrl: HWTSTAMP_FILTER_NONE => 1 (error)
  q: RAVB_NC + tstamp_rx_ctrl: HWTSTAMP_FILTER_NONE => 0
  q: RAVB_BE + tstamp_rx_ctrl: HWTSTAMP_FILTER_PTP_V2_L2_EVENT => 0
  q: RAVB_NC + tstamp_rx_ctrl: HWTSTAMP_FILTER_PTP_V2_L2_EVENT => 1
  q: RAVB_BE + tstamp_rx_ctrl: HWTSTAMP_FILTER_ALL => 1
  q: RAVB_NC + tstamp_rx_ctrl: HWTSTAMP_FILTER_ALL => 0 (error)

This change restores the converted flag check to the correct logic of
the bit-wise driver specific flags.

Reported-by: Simon Horman <horms@kernel.org>
Closes: https://lore.kernel.org/linux-renesas-soc/aQ4xSv9629XF-Bt3@horms.kernel.org/
Fixes: 16e2e6cf75e6 ("net: ravb: Use common defines for time stamping control")
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Link: https://patch.msgid.link/20251107200100.3637869-1-niklas.soderlund+renesas@ragnatech.se
Signed-off-by: Jakub Kicinski <kuba@kernel.org>