Remove use of PLATFORM_CACHE_LINE_SIZE

The required platform constant PLATFORM_CACHE_LINE_SIZE is
unnecessary since CACHE_WRITEBACK_GRANULE effectively provides the
same information. CACHE_WRITEBACK_GRANULE is preferred since this
is an architecturally defined term and allows comparison with the
corresponding hardware register value.

Replace all usage of PLATFORM_CACHE_LINE_SIZE with
CACHE_WRITEBACK_GRANULE.

Also, add a runtime assert in BL1 to check that the provided
CACHE_WRITEBACK_GRANULE matches the value provided in CTR_EL0.

Change-Id: If87286be78068424217b9f3689be358356500dcd
diff --git a/include/lib/aarch64/arch.h b/include/lib/aarch64/arch.h
index 5e21673..912643d 100644
--- a/include/lib/aarch64/arch.h
+++ b/include/lib/aarch64/arch.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2015, ARM Limited and Contributors. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
@@ -302,6 +302,23 @@
 	((endian) & SPSR_E_MASK) << SPSR_E_SHIFT |	\
 	((aif) & SPSR_AIF_MASK) << SPSR_AIF_SHIFT)
 
+/*
+ * CTR_EL0 definitions
+ */
+#define CTR_CWG_SHIFT		24
+#define CTR_CWG_MASK		0xf
+#define CTR_ERG_SHIFT		20
+#define CTR_ERG_MASK		0xf
+#define CTR_DMINLINE_SHIFT	16
+#define CTR_DMINLINE_MASK	0xf
+#define CTR_L1IP_SHIFT		14
+#define CTR_L1IP_MASK		0x3
+#define CTR_IMINLINE_SHIFT	0
+#define CTR_IMINLINE_MASK	0xf
+
+#define MAX_CACHE_LINE_SIZE	0x800 /* 2KB */
+#define SIZE_FROM_LOG2_WORDS(n)	(4 << (n))
+
 
 /* Physical timer control register bit fields shifts and masks */
 #define CNTP_CTL_ENABLE_SHIFT   0