rename symbol: CONFIG_TEGRA -> CONFIG_ARCH_TEGRA

Have this symbol follow the pattern of all other such symbols.

Signed-off-by: Trevor Woerner <twoerner@gmail.com>
diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 9b3ca97..e91b37f 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -1,6 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0+
 
-ifeq ($(CONFIG_SPL_BUILD)$(CONFIG_TEGRA),yy)
+ifeq ($(CONFIG_SPL_BUILD)$(CONFIG_ARCH_TEGRA),yy)
 CONFIG_CPU_V7A=
 CONFIG_CPU_ARM720T=y
 endif
@@ -22,7 +22,7 @@
 
 # On Tegra systems we must build SPL for the armv4 core on the device
 # but otherwise we can use the value in CONFIG_SYS_ARM_ARCH
-ifeq ($(CONFIG_SPL_BUILD)$(CONFIG_TEGRA),yy)
+ifeq ($(CONFIG_SPL_BUILD)$(CONFIG_ARCH_TEGRA),yy)
 arch-y += -D__LINUX_ARM_ARCH__=4
 else
 arch-y += -D__LINUX_ARM_ARCH__=$(CONFIG_SYS_ARM_ARCH)
@@ -76,8 +76,7 @@
 machine-$(CONFIG_STM32)			+= stm32
 machine-$(CONFIG_ARCH_STM32MP)		+= stm32mp
 machine-$(CONFIG_ARCH_SUNXI)		+= sunxi
-# TODO: rename CONFIG_TEGRA -> CONFIG_ARCH_TEGRA
-machine-$(CONFIG_TEGRA)			+= tegra
+machine-$(CONFIG_ARCH_TEGRA)		+= tegra
 machine-$(CONFIG_ARCH_U8500)		+= u8500
 machine-$(CONFIG_ARCH_UNIPHIER)		+= uniphier
 machine-$(CONFIG_ARCH_VERSAL)		+= versal