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 <[e-mail]>
Closes: https://lore.kernel.org/linux-renesas-soc/[e-mail]/
Fixes: 16e2e6cf75e6 ("net: ravb: Use common defines for time stamping control")
Signed-off-by: Niklas Söderlund <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Signed-off-by: Jakub Kicinski <[e-mail]>

drivers/net/ethernet/renesas/ravb_main.c

···
 	bool get_ts;
 
 	if (q == RAVB_NC)
-		get_ts = priv->tstamp_rx_ctrl == HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
+		get_ts = priv->tstamp_rx_ctrl != HWTSTAMP_FILTER_NONE;
 	else
-		get_ts = priv->tstamp_rx_ctrl != HWTSTAMP_FILTER_PTP_V2_L2_EVENT;
+		get_ts = priv->tstamp_rx_ctrl == HWTSTAMP_FILTER_ALL;
 
 	if (!get_ts)
 		return;