Staging: bcm: Fix memory leak reported during compile.

This patch fixes a potential memory leak were temp_buff buffer
is not being freed when a certain condition is true.
Signed-off-by: Kevin McKinney <klmckinney1@gmail.com>
Reviewed-by: Dan Carpenter <error27@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/bcm/Bcmchar.c

@@ -304,6 +304,8 @@ static long bcm_char_ioctl(struct file *filp, UINT cmd, ULONG arg)
 
 			BCM_DEBUG_PRINT(Adapter, DBG_TYPE_PRINTK, 0, 0, "RDM Done On invalid Address : %x Access Denied.\n",
 					(int)sRdmBuffer.Register);
+
+			kfree(temp_buff);
 			return -EINVAL;
 		}