core: applies FF-A v1.2 features on StandaloneMm

edk2's StandaloneMm will be applied with FF-A v1.2.
while applying, StandaloneMm doesn't create anymore PHIT hob by itself
but it should be passed from other software stack.

To make StandaloneMm runs properly, create Hob information and
deliver it using FF-A Boot protocol according to FF-A specification [1].

Also, apply FF-A management protocol to change it [2] to
get/set memory permission instead of using DIRECT_REQ_MSG.

Also, implements some FF-A ABIs to communication StandaloneMm properly.

Link: https://developer.arm.com/documentation/den0077/latest [1]
Link: https://developer.arm.com/documentation/den0140/latest [2]
Signed-off-by: Levi Yun <yeoreum.yun@arm.com>

core/arch/arm/include/ffa.h

@@ -38,6 +38,7 @@
 
 #define FFA_VERSION_1_0			MAKE_FFA_VERSION(1, 0)
 #define FFA_VERSION_1_1			MAKE_FFA_VERSION(1, 1)
+#define FFA_VERSION_1_2			MAKE_FFA_VERSION(1, 2)
 
 /* Function IDs */
 #define FFA_ERROR			U(0x84000060)