net: b44: Remove the unused function __b44_cam_read()

The function __b44_cam_read() is defined in the b44.c file, but not called
elsewhere, so remove this unused function.

drivers/net/ethernet/broadcom/b44.c:199:20: warning: unused function '__b44_cam_read'.
Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=3858Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20230128090413.79824-1-jiapeng.chong@linux.alibaba.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/broadcom/b44.c

@@ -196,28 +196,6 @@ static int b44_wait_bit(struct b44 *bp, unsigned long reg,
 	return 0;
 }
 
-static inline void __b44_cam_read(struct b44 *bp, unsigned char *data, int index)
-{
-	u32 val;
-
-	bw32(bp, B44_CAM_CTRL, (CAM_CTRL_READ |
-			    (index << CAM_CTRL_INDEX_SHIFT)));
-
-	b44_wait_bit(bp, B44_CAM_CTRL, CAM_CTRL_BUSY, 100, 1);
-
-	val = br32(bp, B44_CAM_DATA_LO);
-
-	data[2] = (val >> 24) & 0xFF;
-	data[3] = (val >> 16) & 0xFF;
-	data[4] = (val >> 8) & 0xFF;
-	data[5] = (val >> 0) & 0xFF;
-
-	val = br32(bp, B44_CAM_DATA_HI);
-
-	data[0] = (val >> 8) & 0xFF;
-	data[1] = (val >> 0) & 0xFF;
-}
-
 static inline void __b44_cam_write(struct b44 *bp,
 				   const unsigned char *data, int index)
 {