Replace all SCP FW (BL0, BL3-0) references

This patch replaces all references to the SCP Firmware (BL0, BL30,
BL3-0, bl30) with the image terminology detailed in the TF wiki
(https://github.com/ARM-software/arm-trusted-firmware/wiki):

    BL0          -->  SCP_BL1
    BL30, BL3-0  -->  SCP_BL2
    bl30         -->  scp_bl2

This change affects code, documentation, build system, tools and
platform ports that load SCP firmware. ARM plaforms have been
updated to the new porting API.

IMPORTANT: build option to specify the SCP FW image has changed:

    BL30 --> SCP_BL2

IMPORTANT: This patch breaks compatibility for platforms that use BL2
to load SCP firmware. Affected platforms must be updated as follows:

    BL30_IMAGE_ID --> SCP_BL2_IMAGE_ID
    BL30_BASE --> SCP_BL2_BASE
    bl2_plat_get_bl30_meminfo() --> bl2_plat_get_scp_bl2_meminfo()
    bl2_plat_handle_bl30() --> bl2_plat_handle_scp_bl2()

Change-Id: I24c4c1a4f0e4b9f17c9e4929da815c4069549e58
diff --git a/make_helpers/tbbr/tbbr_tools.mk b/make_helpers/tbbr/tbbr_tools.mk
index eed3808..9b47886 100644
--- a/make_helpers/tbbr/tbbr_tools.mk
+++ b/make_helpers/tbbr/tbbr_tools.mk
@@ -37,7 +37,7 @@
 #   BUILD_PLAT: output directory
 #   NEED_BL32: indicates whether BL3-2 is needed by the platform
 #   BL2: image filename (optional). Default is IMG_BIN(2) (see macro IMG_BIN)
-#   BL30: image filename (optional). Default is IMG_BIN(30)
+#   SCP_BL2: image filename (optional). Default is IMG_BIN(30)
 #   BL31: image filename (optional). Default is IMG_BIN(31)
 #   BL32: image filename (optional). Default is IMG_BIN(32)
 #   BL33: image filename (optional). Default is IMG_BIN(33)
@@ -48,7 +48,7 @@
 #   ROT_KEY
 #   TRUSTED_WORLD_KEY
 #   NON_TRUSTED_WORLD_KEY
-#   BL30_KEY
+#   SCP_BL2_KEY
 #   BL31_KEY
 #   BL32_KEY
 #   BL33_KEY
@@ -81,10 +81,10 @@
 $(eval $(call CERT_ADD_CMD_OPT,${BUILD_PLAT}/tb_fw.crt,--tb-fw-cert))
 $(eval $(call FIP_ADD_PAYLOAD,${BUILD_PLAT}/tb_fw.crt,--tb-fw-cert))
 
-# Add the BL30 CoT (key cert + img cert + image)
-ifneq (${BL30},)
-    $(eval $(call CERT_ADD_CMD_OPT,${BL30},--scp-fw,true))
-    $(if ${BL30_KEY},$(eval $(call CERT_ADD_CMD_OPT,${BL30_KEY},--scp-fw-key)))
+# Add the SCP_BL2 CoT (key cert + img cert + image)
+ifneq (${SCP_BL2},)
+    $(eval $(call CERT_ADD_CMD_OPT,${SCP_BL2},--scp-fw,true))
+    $(if ${SCP_BL2_KEY},$(eval $(call CERT_ADD_CMD_OPT,${SCP_BL2_KEY},--scp-fw-key)))
     $(eval $(call CERT_ADD_CMD_OPT,${BUILD_PLAT}/scp_fw_content.crt,--scp-fw-cert))
     $(eval $(call CERT_ADD_CMD_OPT,${BUILD_PLAT}/scp_fw_key.crt,--scp-fw-key-cert))
     $(eval $(call FIP_ADD_PAYLOAD,${BUILD_PLAT}/scp_fw_content.crt,--scp-fw-cert))