feat(handoff): update register signature

The existing register signature was changed from 0x6ed0ff to account for
0xff being a value that is regularly found in memory [1].

[1] https://github.com/sjg20/firmware_handoff/commit/f70c184905607f6b1d074a5de9aa407a5d92344b

Change-Id: Ib217f1b68df9e534fc61604c88eea4560ecb9dc2
Signed-off-by: Harrison Mutai <harrison.mutai@arm.com>
diff --git a/tftf/tests/tests-firmware-handoff.xml b/tftf/tests/tests-firmware-handoff.xml
index 2761626..4b4b2a4 100644
--- a/tftf/tests/tests-firmware-handoff.xml
+++ b/tftf/tests/tests-firmware-handoff.xml
@@ -7,7 +7,7 @@
 -->
 
 <testsuites>
-  <testsuite name="Firmware Handoff" description="Validate transfer list managed by firmware hanoff framework">
+  <testsuite name="Firmware Handoff" description="Validate transfer list managed by firmware handoff framework">
      <testcase name="Validate transfer list header" function="test_handoff_header" />
      <testcase name="Validate HW_CONFIG in transfer list" function="test_handoff_dtb_payload" />
   </testsuite>