ARM: appropriate __init annotation for const data

Init data marked const should be annotated with __initconst for
correctness and not __initdata.  In some cases the array gathering
references to that data has to be marked const as well. This fixes
LTO builds that otherwise fail with section mismatch errors.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
diff --git a/arch/arm/mach-digicolor/digicolor.c b/arch/arm/mach-digicolor/digicolor.c
index cfc88d1..4d62f1b 100644
--- a/arch/arm/mach-digicolor/digicolor.c
+++ b/arch/arm/mach-digicolor/digicolor.c
@@ -8,7 +8,7 @@
 
 #include <asm/mach/arch.h>
 
-static const char *digicolor_dt_compat[] __initconst = {
+static const char *const digicolor_dt_compat[] __initconst = {
 	"cnxt,cx92755",
 	NULL,
 };