[ARM] 3982/2: Explicitly select 32-bit ARM ISA (-marm)

Do not assume that the ARM GCC toolchain defaults to building for the
32-bit ARM ISA (-marm) case. Instead, explicitly select -marm in CFLAGS
since the toolchain default can be for the 16-bit Thumb ISA (-mthumb) in
some odd/rare cases.
Signed-off-by: NGeorge G. Davis <gdavis@mvista.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/Makefile

@@ -15,6 +15,8 @@ CPPFLAGS_vmlinux.lds = -DTEXT_OFFSET=$(TEXT_OFFSET)
 OBJCOPYFLAGS	:=-O binary -R .note -R .comment -S
 GZFLAGS		:=-9
 #CFLAGS		+=-pipe
+# Explicitly specifiy 32-bit ARM ISA since toolchain default can be -mthumb:
+CFLAGS		+=$(call cc-option,-marm,)
 
 # Do not use arch/arm/defconfig - it's always outdated.
 # Select a platform tht is kept up-to-date