staging: vt6655: Remove unused function prototype and definition

Remove the MACbIsRegBitsOn function, as it is never called in kernel tree.
Signed-off-by: Madhumitha Prabakaran <madhumithabiw@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/vt6655/mac.c

@@ -12,7 +12,6 @@
  * Date: May 21, 1996
  *
  * Functions:
- *      MACbIsRegBitsOn - Test if All test Bits On
  *      MACbIsRegBitsOff - Test if All test Bits Off
  *      MACbIsIntDisable - Test if MAC interrupt disable
  *      MACvSetShortRetryLimit - Set 802.11 Short Retry limit
@@ -42,29 +41,6 @@
 #include "tmacro.h"
 #include "mac.h"
 
-/*
- * Description:
- *      Test if all test bits on
- *
- * Parameters:
- *  In:
- *      io_base    - Base Address for MAC
- *      byRegOfs    - Offset of MAC Register
- *      byTestBits  - Test bits
- *  Out:
- *      none
- *
- * Return Value: true if all test bits On; otherwise false
- *
- */
-bool MACbIsRegBitsOn(struct vnt_private *priv, unsigned char byRegOfs,
-		     unsigned char byTestBits)
-{
-	void __iomem *io_base = priv->PortOffset;
-
-	return (ioread8(io_base + byRegOfs) & byTestBits) == byTestBits;
-}
-
 /*
  * Description:
  *      Test if all test bits off

drivers/staging/vt6655/mac.h

@@ -876,8 +876,6 @@ do {								\
 #define MACvSetRFLE_LatchBase(iobase)                                 \
 	MACvWordRegBitsOn(iobase, MAC_REG_SOFTPWRCTL, SOFTPWRCTL_RFLEOPT)
 
-bool MACbIsRegBitsOn(struct vnt_private *priv, unsigned char byRegOfs,
-		     unsigned char byTestBits);
 bool MACbIsRegBitsOff(struct vnt_private *priv, unsigned char byRegOfs,
 		      unsigned char byTestBits);