refactor(cpus): move cpu_ops field defines to a header

The cpu_macros.S file is loaded with lots of definitions for the cpu_ops
structure. However, since they are defined as .equ directives they are
inaccessible for C code. Convert them to #defines, put them into order,
refactor them for readability, and extract them to a separate file to
make this possible.

This has the benefit of removing some Aarch differences and a lot of
duplicate code.

Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: I72861794b6c9131285a9297d5918822ed718b228
(cherry picked from commit 007433d8cf54afeab7e2fe160c5710e6035c7705)
diff --git a/drivers/st/crypto/stm32_pka.c b/drivers/st/crypto/stm32_pka.c
index e03cf0f..f8b37f3 100644
--- a/drivers/st/crypto/stm32_pka.c
+++ b/drivers/st/crypto/stm32_pka.c
@@ -28,10 +28,10 @@
 
 #define UINT8_LEN			8U
 #define UINT64_LEN			(UINT8_LEN * sizeof(uint64_t))
-#define WORD_SIZE			(sizeof(uint64_t))
+#define PKA_WORD_SIZE			(sizeof(uint64_t))
 #define OP_NBW_FROM_LEN(len)		(DIV_ROUND_UP_2EVAL((len), UINT64_LEN) + 1)
 #define OP_NBW_FROM_SIZE(s)		OP_NBW_FROM_LEN((s) * UINT8_LEN)
-#define OP_SIZE_FROM_SIZE(s)		(OP_NBW_FROM_SIZE(s) * WORD_SIZE)
+#define OP_SIZE_FROM_SIZE(s)		(OP_NBW_FROM_SIZE(s) * PKA_WORD_SIZE)
 
 #define DT_PKA_COMPAT			"st,stm32-pka64"