[rom_ext] Advance version to ROM_EXT 0.7

Features:
- Ownership Transfer.
- Valid DICE chain from CA->UDS->CDI_0->CDI_1.

Bug fixes:
- `protect_when_primary` is renamed to `protect_when_active` and
  protects whichever slot is the active slot.
- Report the `primary_bl0_slot` correctly after a `SetNextBl0` command.

Signed-off-by: Chris Frantz <[email protected]>

sw/device/silicon_creator/rom_ext/defs.bzl

@@ -14,8 +14,8 @@ def secver_write_selection():
 # because of how the bazel rule accepts attributes.
 ROM_EXT_VERSION = struct(
     MAJOR = "0",
-    MINOR = "6",
-    SECURITY = "6",
+    MINOR = "7",
+    SECURITY = "7",
 )
 
 SLOTS = [