feat(rmmd): add support for RMM Boot interface

This patch adds the infrastructure needed to pass boot arguments from
EL3 to RMM and allocates a shared buffer between both worlds that can
be used, among others, to pass a boot manifest to RMM. The buffer is
composed a single memory page be used by a later EL3 <-> RMM interface
by all CPUs.

The RMM boot manifest is not implemented by this patch.

In addition to that, this patch also enables support for RMM when
RESET_TO_BL31 is enabled.

Signed-off-by: Javier Almansa Sobrino <javier.almansasobrino@arm.com>
Change-Id: I855cd4758ee3843eadd9fb482d70a6d18954d82a
diff --git a/plat/arm/board/fvp/fvp_plat_attest_token.c b/plat/arm/board/fvp/fvp_plat_attest_token.c
index 5463f33..1b0854b 100644
--- a/plat/arm/board/fvp/fvp_plat_attest_token.c
+++ b/plat/arm/board/fvp/fvp_plat_attest_token.c
@@ -300,8 +300,8 @@
 	0xB0, 0x3A
 };
 
-int plat_get_cca_attest_token(uintptr_t buf, size_t *len,
-			       uintptr_t hash, size_t hash_size)
+int plat_rmmd_get_cca_attest_token(uintptr_t buf, size_t *len,
+				   uintptr_t hash, size_t hash_size)
 {
 	(void)hash;
 	(void)hash_size;