bootmem: add new memory type for BL31

After CL:31122, we can finally define a memory type specific for BL31,
to make sure BL31 is not loaded on other reserved area.

Change-Id: Idbd9a7fe4b12af23de1519892936d8d88a000e2c
Signed-off-by: Ting Shen <phoenixshen@google.com>
Reviewed-on: https://review.coreboot.org/c/31123
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

src/lib/bootmem.c

@@ -59,6 +59,8 @@ static uint32_t bootmem_to_lb_tag(const enum bootmem_type tag)
 		return LB_MEM_UNUSABLE;
 	case BM_MEM_VENDOR_RSVD:
 		return LB_MEM_VENDOR_RSVD;
+	case BM_MEM_BL31:
+		return LB_MEM_RESERVED;
 	case BM_MEM_TABLE:
 		return LB_MEM_TABLE;
 	default:
@@ -142,6 +144,7 @@ static const struct range_strings type_strings[] = {
 	{ BM_MEM_NVS, "NVS" },
 	{ BM_MEM_UNUSABLE, "UNUSABLE" },
 	{ BM_MEM_VENDOR_RSVD, "VENDOR RESERVED" },
+	{ BM_MEM_BL31, "BL31" },
 	{ BM_MEM_TABLE, "CONFIGURATION TABLES" },
 	{ BM_MEM_RAMSTAGE, "RAMSTAGE" },
 	{ BM_MEM_PAYLOAD, "PAYLOAD" },