refactor(cpus): convert print_errata_status to C

The function is called in a fully initialised C environment and calls
into other C functions. The Aarch differences are minimal and are hidden
by the pre-existing headers. Converting it results into cleaner code
that is the same across both Aarch64 and Aarch32.

To avoid having to do very ugly pointer arithmetic, define a C struct
for the cpu_ops for both Aarch64 and Aarch32.

Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: Idc07c4064e03143c88a4a0e2d10ceda70ba19a50
diff --git a/bl2/bl2.mk b/bl2/bl2.mk
index 41bcd12..19b955f 100644
--- a/bl2/bl2.mk
+++ b/bl2/bl2.mk
@@ -41,8 +41,7 @@
 BL2_SOURCES		+=	bl2/${ARCH}/bl2_el3_entrypoint.S	\
 				bl2/${ARCH}/bl2_el3_exceptions.S	\
 				bl2/${ARCH}/bl2_run_next_image.S        \
-				lib/cpus/${ARCH}/cpu_helpers.S		\
-				lib/cpus/errata_report.c
+				lib/cpus/${ARCH}/cpu_helpers.S
 
 ifeq (${DISABLE_MTPMU},1)
 BL2_SOURCES		+=	lib/extensions/mtpmu/${ARCH}/mtpmu.S