soc: tegra: Remove redundant $(CONFIG_ARCH_TEGRA) in Makefile

Kbuild descends into drivers/soc/tegra/ only when CONFIG_ARCH_TEGRA
is enabled. (see drivers/soc/Makefile)

$(CONFIG_ARCH_TEGRA) in drivers/soc/tegra/Makefile always evaluates
to 'y'.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
diff --git a/drivers/soc/tegra/Makefile b/drivers/soc/tegra/Makefile
index cdaad9d..ae857ff 100644
--- a/drivers/soc/tegra/Makefile
+++ b/drivers/soc/tegra/Makefile
@@ -1,4 +1,4 @@
-obj-$(CONFIG_ARCH_TEGRA) += fuse/
+obj-y += fuse/
 
-obj-$(CONFIG_ARCH_TEGRA) += common.o
-obj-$(CONFIG_ARCH_TEGRA) += pmc.o
+obj-y += common.o
+obj-y += pmc.o