can: flexcan: remove not needed struct flexcan_priv::tx_mb and struct flexcan_priv::tx_mb_idx
commit e05237f9da42ee52e73acea0bb082d788e111229 upstream. The previous patch changes the TX path to always use the last mailbox regardless of the used offload scheme (rx-fifo or timestamp based). This means members "tx_mb" and "tx_mb_idx" of the struct flexcan_priv don't depend on the offload scheme, so replace them by compile time constants. Cc: linux-stable <stable@vger.kernel.org> Signed-off-by: NMarc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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