Revert "Overriding 'printf'"

This reverts commit 030a47ce46a322beed3f847403caefc4f2815462, which
broke CI with GNU Arm toolchain 7.3.1

Signed-off-by: David Hu <david.hu@arm.com>
Change-Id: I5b006b74e2206ecf7ac33f8b90b5bec3e4f1c8b8
1 file changed