Add timestamp table pointer to the coreboot table.

This change exports the timestamp table pointer through coreboot
table to make it possible for u-boot to add timestamps to the
table.

Inclusion of cbmem.h allows to drop external declarations in
coreboot_table.c.

Change-Id: Ia070198cee7a6ffdaeece03d9d15bd91e033b6d1
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: http://review.coreboot.org/716
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/include/boot/coreboot_tables.h

@@ -195,6 +195,14 @@ struct lb_framebuffer {
 	uint8_t reserved_mask_size;
 };
 
+#define LB_TAG_TIMESTAMPS	0x0016
+struct lb_tstamp {
+	uint32_t tag;
+	uint32_t size;
+
+	void	*tstamp_tab;
+};
+
 /* The following structures are for the cmos definitions table */
 #define LB_TAG_CMOS_OPTION_TABLE 200
 /* cmos header record */