staging: vt6655: Rename function MACbSafeStop

Rename function MACbSafeStop to vt6655_mac_safe_stop to avoid CamelCase
which is not accepted by checkpatch.pl. Remove unnecessary declaration
of function and make function static.
Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/5c91b281dfab75e5ccf13413232ec993a8056af8.1662890990.git.philipp.g.hortmann@gmail.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6655/mac.c

@@ -19,7 +19,7 @@
  *      MACbSoftwareReset - Software Reset MAC
  *      vt6655_mac_safe_rx_off - Turn Off MAC Rx
  *      vt6655_mac_safe_tx_off - Turn Off MAC Tx
- *      MACbSafeStop - Stop MAC function
+ *      vt6655_mac_safe_stop - Stop MAC function
  *      MACbShutdown - Shut down MAC
  *      MACvInitialize - Initialize MAC
  *      MACvSetCurrRxDescAddr - Set Rx Descriptors Address
@@ -432,7 +432,7 @@ static bool vt6655_mac_safe_tx_off(struct vnt_private *priv)
  * Return Value: true if success; otherwise false
  *
  */
-bool MACbSafeStop(struct vnt_private *priv)
+static bool vt6655_mac_safe_stop(struct vnt_private *priv)
 {
 	void __iomem *io_base = priv->port_offset;
 
@@ -474,7 +474,7 @@ bool MACbShutdown(struct vnt_private *priv)
 	iowrite32(0, io_base + MAC_REG_IMR);
 	vt6655_mac_set_loopback_mode(priv, MAC_LB_INTERNAL);
 	/* stop the adapter */
-	if (!MACbSafeStop(priv)) {
+	if (!vt6655_mac_safe_stop(priv)) {
 		vt6655_mac_set_loopback_mode(priv, MAC_LB_NONE);
 		return false;
 	}

drivers/staging/vt6655/mac.h

@@ -554,7 +554,6 @@ void vt6655_mac_set_short_retry_limit(struct vnt_private *priv, unsigned char re
 void MACvSetLongRetryLimit(struct vnt_private *priv, unsigned char byRetryLimit);
 
 bool MACbSoftwareReset(struct vnt_private *priv);
-bool MACbSafeStop(struct vnt_private *priv);
 bool MACbShutdown(struct vnt_private *priv);
 void MACvInitialize(struct vnt_private *priv);
 void MACvSetCurrRx0DescAddr(struct vnt_private *priv,