ARM: add permission annotations to MT_MEMORY* mapping types

Document the permissions which the various MT_MEMORY* mapping types
will provide.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

arch/arm/kernel/tcm.c

@@ -52,7 +52,7 @@ static struct map_desc dtcm_iomap[] __initdata = {
 		.virtual	= DTCM_OFFSET,
 		.pfn		= __phys_to_pfn(DTCM_OFFSET),
 		.length		= 0,
-		.type		= MT_MEMORY_DTCM
+		.type		= MT_MEMORY_RW_DTCM
 	}
 };
 
@@ -61,7 +61,7 @@ static struct map_desc itcm_iomap[] __initdata = {
 		.virtual	= ITCM_OFFSET,
 		.pfn		= __phys_to_pfn(ITCM_OFFSET),
 		.length		= 0,
-		.type		= MT_MEMORY_ITCM
+		.type		= MT_MEMORY_RWX_ITCM,
 	}
 };