xlat_tables_v2: add base table section name parameter for spm_mm

Core spm_mm code expects the translation tables are located in the
inner & outer WBWA & shareable memory.
REGISTER_XLAT_CONTEXT2 macro is used to specify the translation
table section in spm_mm.

In the commit 363830df1c28e (xlat_tables_v2: merge
REGISTER_XLAT_CONTEXT_{FULL_SPEC,RO_BASE_TABLE}), REGISTER_XLAT_CONTEXT2
macro explicitly specifies the base xlat table goes into .bss by default.
This change affects the existing SynQuacer spm_mm implementation.
plat/socionext/synquacer/include/plat.ld.S linker script intends to
locate ".bss.sp_base_xlat_table" into "sp_xlat_table" section,
but this implementation is no longer available.

This patch adds the base table section name parameter for
REGISTER_XLAT_CONTEXT2 so that platform can specify the
inner & outer WBWA & shareable memory for spm_mm base xlat table.
If PLAT_SP_IMAGE_BASE_XLAT_SECTION_NAME is not defined, base xlat table
goes into .bss by default, the result is same as before.

Change-Id: Ie0e1a235e5bd4288dc376f582d6c44c5df6d31b2
Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
diff --git a/plat/socionext/synquacer/include/platform_def.h b/plat/socionext/synquacer/include/platform_def.h
index b87ac3f..2f8613a 100644
--- a/plat/socionext/synquacer/include/platform_def.h
+++ b/plat/socionext/synquacer/include/platform_def.h
@@ -144,6 +144,7 @@
 #define PLAT_SP_IMAGE_MMAP_REGIONS	30
 #define PLAT_SP_IMAGE_MAX_XLAT_TABLES	20
 #define PLAT_SP_IMAGE_XLAT_SECTION_NAME	"sp_xlat_table"
+#define PLAT_SP_IMAGE_BASE_XLAT_SECTION_NAME	"sp_xlat_table"
 
 #define PLAT_SQ_UART1_BASE		PLAT_SQ_BOOT_UART_BASE
 #define PLAT_SQ_UART1_SIZE		ULL(0x1000)