drivers: cosmetic: Convert SPDX license tags to Linux Kernel style

Complete in the drivers directory the work started with
commit 83d290c56fab ("SPDX: Convert all of our single
license tags to Linux Kernel style").

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/drivers/clk/Makefile b/drivers/clk/Makefile
index f87c9ae..821b586 100644
--- a/drivers/clk/Makefile
+++ b/drivers/clk/Makefile
@@ -1,9 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (c) 2015 Google, Inc
 # Wolfgang Denk, DENX Software Engineering, wd@denx.de.
 #
-# SPDX-License-Identifier:      GPL-2.0+
-#
 
 obj-$(CONFIG_$(SPL_TPL_)CLK) += clk-uclass.o clk_fixed_rate.o
 
diff --git a/drivers/clk/altera/Makefile b/drivers/clk/altera/Makefile
index 2542b7f..a3ae8b2 100644
--- a/drivers/clk/altera/Makefile
+++ b/drivers/clk/altera/Makefile
@@ -1,7 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (C) 2018 Marek Vasut <marex@denx.de>
 #
-# SPDX-License-Identifier:      GPL-2.0+
-#
 
 obj-$(CONFIG_TARGET_SOCFPGA_ARRIA10) += clk-arria10.o
diff --git a/drivers/clk/aspeed/Makefile b/drivers/clk/aspeed/Makefile
index 65d1cd6..81764b4 100644
--- a/drivers/clk/aspeed/Makefile
+++ b/drivers/clk/aspeed/Makefile
@@ -1,7 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (c) 2016 Google, Inc
 #
-# SPDX-License-Identifier:      GPL-2.0+
-#
 
 obj-$(CONFIG_ASPEED_AST2500) += clk_ast2500.o
diff --git a/drivers/clk/owl/Makefile b/drivers/clk/owl/Makefile
index 9132dcc..63ab573 100644
--- a/drivers/clk/owl/Makefile
+++ b/drivers/clk/owl/Makefile
@@ -1,3 +1,3 @@
-# SPDX-License-Identifier:	GPL-2.0+
+# SPDX-License-Identifier: GPL-2.0+
 
 obj-$(CONFIG_CLK_S900) += clk_s900.o
diff --git a/drivers/clk/rockchip/Makefile b/drivers/clk/rockchip/Makefile
index eae0ef6..41cfb7a 100644
--- a/drivers/clk/rockchip/Makefile
+++ b/drivers/clk/rockchip/Makefile
@@ -1,8 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0+
 #
 # Copyright (c) 2017 Rockchip Electronics Co., Ltd
 #
-# SPDX-License-Identifier:      GPL-2.0+
-#
 
 obj-$(CONFIG_ROCKCHIP_RK3036) += clk_rk3036.o
 obj-$(CONFIG_ROCKCHIP_RK3128) += clk_rk3128.o
diff --git a/drivers/clk/tegra/Makefile b/drivers/clk/tegra/Makefile
index 0fcc5205..7f1a318 100644
--- a/drivers/clk/tegra/Makefile
+++ b/drivers/clk/tegra/Makefile
@@ -1,6 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0
+#
 # Copyright (c) 2016, NVIDIA CORPORATION.
 #
-# SPDX-License-Identifier: GPL-2.0
 
 obj-$(CONFIG_TEGRA_CAR_CLOCK) += tegra-car-clk.o
 obj-$(CONFIG_TEGRA186_CLOCK) += tegra186-clk.o