mb/nuc_box/: shrink ME region for consumer bin. in FMAP

After switching from Corporate to Consumer CSME, the ME binary shrunk.
This allows to reclaim some free space in the FMAP by shrinking the
region.

Upstream-Status: Pending
Signed-off-by: Filip Lewiński <filip.lewinski@3mdeb.com>

Author: filipleple

src/mainboard/novacustom/nuc_box/variants/nuc_box/board.fmd

@@ -1,11 +1,12 @@
 FLASH 32M {
-	SI_ALL 16M {
-		SI_DESC 0x4000     # 16K
+	SI_ALL 10M {
+		SI_DESC 16K
 #if CONFIG_MAINBOARD_USES_IFD_GBE_REGION
-		SI_GBE 0x1000      # 4K (overlaps with PD)
+		SI_GBE 8K
 #endif
-		SI_ME 0x009ec000   # 10,137,600 bytes = matches IFD exactly
+		SI_ME
 	}
+	RW_UNUSED 6M
 
 	SI_BIOS@0x01000000 16M {
 		RW_MISC 2M {