ARM: tegra: Remove gratuitous parentheses in SPDX license identifier

Parentheses in the SPDX license identifier are only used to group sub-
expressions. If there's no need for such grouping, the parentheses can
be omitted.
Reviewed-by: Igor Opaniuk <igor.opaniuk@toradex.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>

arch/arm/boot/dts/tegra124-apalis-v1.2-eval.dts

-// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+// SPDX-License-Identifier: GPL-2.0 OR MIT
 /*
  * Copyright 2016-2018 Toradex AG
  */

arch/arm/boot/dts/tegra124-apalis-v1.2.dtsi

-// SPDX-License-Identifier: (GPL-2.0 OR MIT)
+// SPDX-License-Identifier: GPL-2.0 OR MIT
 /*
  * Copyright 2016-2018 Toradex AG
  */