habanalabs: remove redundant memset

From reviewing the code, the line
  memset(kdata, 0, usize);
is not needed because kdata is either zeroed by
  kdata = kzalloc(asize, GFP_KERNEL);
when allocated at runtime or by
  char stack_kdata[128] = {0};
at compile time.

Signed-off-by: Tom Rix <trix@redhat.com>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>

drivers/accel/habanalabs/common/habanalabs_ioctl.c

@@ -1123,8 +1123,6 @@ static long _hl_ioctl(struct file *filep, unsigned int cmd, unsigned long arg,
 			retcode = -EFAULT;
 			goto out_err;
 		}
-	} else if (cmd & IOC_OUT) {
-		memset(kdata, 0, usize);
 	}
 
 	retcode = func(hpriv, kdata);