[U-Boot] [PATCH v2] ARM: fix arch/arm/Makefile for Tegra

[Masahiro Yamada]

Since commit 79d75d752717 (ARM: move -march=* and -mtune= options to
arch/arm/Makefile), all the Tegra boards are broken because the SPL
is built for ARMv7.

Insert Tegra-specific code to arch/arm/Makefile to set compiler
flags for an earlier ARM architecture.

Note:
The v1 patch for commit 79d75d752717 *was* correct when it was
submitted.  Notice it was originally written for multi .config
configuration where Kconfig set CONFIG_CPU_V7/CONFIG_CPU_ARM720T for
Tegra U-Boot Main/SPL, respectively.  But, until it was merged into
the mainline, commit e02ee2548afe (kconfig: switch to single .config
configuration) had been already applied there.

Signed-off-by: Masahiro Yamada <yamada.masahiro at socionext.com>
Reported-by: Stephen Warren <swarren at nvidia.com>
Reported-by: Jan Kiszka <jan.kiszka at siemens.com>
Tested-by: Jan Kiszka <jan.kiszka at siemens.com>
---

Changes in v2:
  - Brush up the commit-description because V1 had a typo (s/look/took/)
  - Add Jan's Tested-by credit

 arch/arm/Makefile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/Makefile b/arch/arm/Makefile
index 6463c19..bd4749c 100644
--- a/arch/arm/Makefile
+++ b/arch/arm/Makefile
@@ -2,6 +2,11 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
+ifeq ($(CONFIG_SPL_BUILD)$(CONFIG_TEGRA),yy)
+CONFIG_CPU_V7=
+CONFIG_CPU_ARM720T=y
+endif
+
 # This selects which instruction set is used.
 arch-$(CONFIG_CPU_ARM720T)	=-march=armv4
 arch-$(CONFIG_CPU_ARM920T)	=-march=armv4
-- 
1.9.1