ANDROID: arm64: Fix a copy-paste error in prior init_thread_info build fix

Fix a really embarrassing copy-paste error introduced
in Change-Id: I13bf03211f0d918d388d1436099d286c10a23e5d
to fix init_thread_info build error.

Fixes: Change-Id: I13bf03211f0d918d388d1436099d286c10a23e5d
       ("ANDROID: arm64: fix undeclared 'init_thread_info' error")
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>