spm: Remove SPM Alpha 1 prototype and support files

The Secure Partition Manager (SPM) prototype implementation is
being removed. This is preparatory work for putting in place a
dispatcher component that, in turn, enables partition managers
at S-EL2 / S-EL1.

This patch removes:

- The core service files (std_svc/spm)
- The Resource Descriptor headers (include/services)
- SPRT protocol support and service definitions
- SPCI protocol support and service definitions

Change-Id: Iaade6f6422eaf9a71187b1e2a4dffd7fb8766426
Signed-off-by: Paul Beesley <paul.beesley@arm.com>
Signed-off-by: Artsem Artsemenka <artsem.artsemenka@arm.com>

services/std_svc/std_svc_setup.c

@@ -45,7 +45,7 @@ static int32_t std_svc_setup(void)
 		ret = 1;
 	}
 
-#if ENABLE_SPM || SPM_MM
+#if SPM_MM
 	if (spm_setup() != 0) {
 		ret = 1;
 	}