qcs405: Update bootblock size

Increase the size of bootblock from 96K to 128K.

Change-Id: Ifc6e7239ed2978a8490fa229945ebd5ed9182298
Signed-off-by: Nitheesh Sekar <nsekar@codeaurora.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/33159
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/mistral/chromeos.fmd

@@ -16,7 +16,7 @@
 FLASH@0x0 8M {
 	WP_RO 4M {
 		RO_SECTION 0x204000 {
-			BOOTBLOCK 96K
+			BOOTBLOCK 128K
 			COREBOOT(CBFS)
 			FMAP@0x200000 0x1000
 			GBB 0x2f00