doc: Chromebook Coral: Fix typo for "Top of CAR region"

The value for "Top of CAR region" should be fefc0000, not
fefc000. This matches the Kconfig default values, as
SYS_CAR_ADDR and SYS_CAR_SIZE are 0xfef00000 and 0xc0000
respectively.

Signed-off-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/doc/board/google/chromebook_coral.rst b/doc/board/google/chromebook_coral.rst
index d10e0c4..40bd939 100644
--- a/doc/board/google/chromebook_coral.rst
+++ b/doc/board/google/chromebook_coral.rst
@@ -179,7 +179,7 @@
     ffffffff       Top of ROM (and last byte of 32-bit address space)
     ffff8000       TPL loaded here (from IFWI)
     ff000000       Bottom of ROM
-     fefc000       Top of CAR region
+    fefc0000       Top of CAR region
     fef96000       Stack for FSP-M
     fef40000 59000 FSP-M
     fef11000       SPL loaded here