chromeos: Remove CONFIG_VBNV_SIZE variable

The VBNV region size is determined by vboot and is not really
configurable.  Only the CMOS implementation defined this config
variable so switch it to use VBNV_BLOCK_SIZE defined by vboot
in vbnv_layout.h instead.

This requires updating the broadwell/skylake cmos reset functions
to use the right constant.

BUG=chrome-os-partner:47915
BRANCH=glados
TEST=manually tested on chell

Change-Id: I45e3efc2a22efcb1470bbbefbdae4eda33fc6c96
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: e2b803ff3ac30ab22d65d1e62aca623730999a1d
Original-Change-Id: I4896a1a5b7889d77ad00c4c8f285d184c4218e17
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/324520
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/13598
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/lib/coreboot_table.c b/src/lib/coreboot_table.c
index 2226f5e..86f22c9 100644
--- a/src/lib/coreboot_table.c
+++ b/src/lib/coreboot_table.c
@@ -39,6 +39,7 @@
 #endif
 #include <vendorcode/google/chromeos/chromeos.h>
 #include <vendorcode/google/chromeos/gnvs.h>
+#include <vendorcode/google/chromeos/vbnv_layout.h>
 #endif
 #if CONFIG_ARCH_X86
 #include <cpu/x86/mtrr.h>
@@ -191,7 +192,7 @@
 	vbnv->tag = LB_TAG_VBNV;
 	vbnv->size = sizeof(*vbnv);
 	vbnv->range_start = CONFIG_VBNV_OFFSET + 14;
-	vbnv->range_size = CONFIG_VBNV_SIZE;
+	vbnv->range_size = VBNV_BLOCK_SIZE;
 #endif
 }