can: ems_pci: Remove unnecessary (void*) conversions

No need cast (void*) to (struct ems_pci_card *).
Signed-off-by: Wu Yunchuan <yunchuan@nfschina.com>
Acked-by: Marc Kleine-Budde <mkl@pengutronix.de>
Link: https://lore.kernel.org/r/20230717031221.55073-1-yunchuan@nfschina.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/can/sja1000/ems_pci.c

@@ -148,7 +148,7 @@ static void ems_pci_v1_write_reg(const struct sja1000_priv *priv,
 
 static void ems_pci_v1_post_irq(const struct sja1000_priv *priv)
 {
-	struct ems_pci_card *card = (struct ems_pci_card *)priv->priv;
+	struct ems_pci_card *card = priv->priv;
 
 	/* reset int flag of pita */
 	writel(PITA2_ICR_INT0_EN | PITA2_ICR_INT0,
@@ -168,7 +168,7 @@ static void ems_pci_v2_write_reg(const struct sja1000_priv *priv,
 
 static void ems_pci_v2_post_irq(const struct sja1000_priv *priv)
 {
-	struct ems_pci_card *card = (struct ems_pci_card *)priv->priv;
+	struct ems_pci_card *card = priv->priv;
 
 	writel(PLX_ICSR_ENA_CLR, card->conf_addr + PLX_ICSR);
 }
@@ -186,7 +186,7 @@ static void ems_pci_v3_write_reg(const struct sja1000_priv *priv,
 
 static void ems_pci_v3_post_irq(const struct sja1000_priv *priv)
 {
-	struct ems_pci_card *card = (struct ems_pci_card *)priv->priv;
+	struct ems_pci_card *card = priv->priv;
 
 	writel(ASIX_LINTSR_INT0AC, card->conf_addr + ASIX_LINTSR);
 }