can: xilinx_can: Fix style issues

This patch fixes below checkpatch warnings and checks in the driver.

CHECK: Alignment should match open parenthesis
+       void (*write_reg)(const struct xcan_priv *priv, enum xcan_reg reg,
+                       u32 val);

CHECK: Alignment should match open parenthesis
+static void xcan_write_reg_le(const struct xcan_priv *priv, enum xcan_reg reg,
+                       u32 val)

CHECK: Alignment should match open parenthesis
+static void xcan_write_reg_be(const struct xcan_priv *priv, enum xcan_reg reg,
+                       u32 val)

CHECK: Alignment should match open parenthesis
+       netdev_dbg(ndev, "BRPR=0x%08x, BTR=0x%08x\n",
+                       priv->read_reg(priv, XCAN_BRPR_OFFSET),

CHECK: Alignment should match open parenthesis
+                       netdev_warn(ndev,
+                               "timed out for correct mode\n");

CHECK: Alignment should match open parenthesis
+       netdev_dbg(ndev, "status:#x%08x\n",
+                       priv->read_reg(priv, XCAN_SR_OFFSET));

CHECK: spaces preferred around that '-' (ctx:VxV)
+                       (CAN_EFF_ID_BITS-CAN_SFF_ID_BITS)) <<
                                        ^

CHECK: Alignment should match open parenthesis
+       netdev_dbg(ndev, "%s: error status register:0x%x\n",
+                       __func__, priv->read_reg(priv, XCAN_ESR_OFFSET));

WARNING: line over 80 characters
+                       offset = XCAN_RXMSG_2_FRAME_OFFSET(fsr & XCAN_FSR_RI_MASK);

WARNING: line over 80 characters
+                       offset = XCAN_RXMSG_FRAME_OFFSET(fsr & XCAN_FSR_RI_MASK);

WARNING: line over 80 characters
+               while ((isr & XCAN_IXR_TXOK_MASK) && !WARN_ON(++retries == 100)) {

WARNING: line over 80 characters
+                       priv->write_reg(priv, XCAN_ICR_OFFSET, XCAN_IXR_TXOK_MASK);

CHECK: Alignment should match open parenthesis
+               netdev_err(ndev, "%s: pm_runtime_get failed(%d)\n",
+                               __func__, ret);

CHECK: Alignment should match open parenthesis
+       ret = request_irq(ndev->irq, xcan_interrupt, priv->irq_flags,
+                       ndev->name, ndev);

CHECK: Alignment should match open parenthesis
+static int xcan_get_berr_counter(const struct net_device *ndev,
+                                       struct can_berr_counter *bec)

CHECK: Alignment should match open parenthesis
+               netdev_err(ndev, "%s: pm_runtime_get failed(%d)\n",
+                               __func__, ret);

CHECK: Please don't use multiple blank lines
+
+

CHECK: Alignment should match open parenthesis
+               netdev_err(ndev, "%s: pm_runtime_get failed(%d)\n",
+                       __func__, ret);`

Signed-off-by: Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>