x86: acpi: Expand the GNVS

Expand this to 4KB so that it is possible to add custom information to it.
On Chromebooks this is used to pass verified-boot information.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/x86/include/asm/intel_gnvs.h b/arch/x86/include/asm/intel_gnvs.h
index e2d479d..c1e9d65 100644
--- a/arch/x86/include/asm/intel_gnvs.h
+++ b/arch/x86/include/asm/intel_gnvs.h
@@ -36,6 +36,7 @@
 	u8	unused2[0x1000 - 0x100];	/* Pad out to 4096 bytes */
 #endif
 };
+
 #ifdef CONFIG_CHROMEOS
 check_member(acpi_global_nvs, chromeos, GNVS_CHROMEOS_ACPI_OFFSET);
 #endif