arm: Add Kconfig symbols used for Linux asm compatibility

Rather than change asm files that come from Linux, add the symbols
to Kconfig. Since one of the symbols is for thumb2 builds, make
CPU_V7M always select them.

Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com>

arch/arm/Kconfig

@@ -19,6 +19,15 @@ config HAS_VBAR
 config HAS_THUMB2
 	bool
 
+# Used for compatibility with asm files copied from the kernel
+config ARM_ASM_UNIFIED
+	bool
+	default y
+
+# Used for compatibility with asm files copied from the kernel
+config THUMB2_KERNEL
+	bool
+
 # If set, the workarounds for these ARM errata are applied early during U-Boot
 # startup. Note that in general these options force the workarounds to be
 # applied; no CPU-type/version detection exists, unlike the similar options in
@@ -128,6 +137,7 @@ config CPU_V7
 config CPU_V7M
 	bool
 	select HAS_THUMB2
+	select THUMB2_KERNEL
 	select SYS_CACHE_SHIFT_5
 
 config CPU_PXA

arch/arm/lib/Makefile

@@ -72,8 +72,6 @@ ifneq (,$(findstring -mabi=aapcs-linux,$(PLATFORM_CPPFLAGS)))
 extra-y	+= eabi_compat.o
 endif
 
-asflags-y += -DCONFIG_ARM_ASM_UNIFIED
-
 # some files can only build in ARM or THUMB2, not THUMB1
 
 ifdef CONFIG_$(SPL_)SYS_THUMB_BUILD