ABI: Update internal whitelist with debugfs symbols

To ease testing efforts, add all necessary debugfs symbols in the
internal whitelist so that DEBUG_FS config can be turned on when
necessary without having to change the actual whitelist.

Change-Id: Ic5862a0a7ecc4bda1171265baf7b5847773a1b70
Signed-off-by: Prakruthi Deepak Heragu <pheragu@codeaurora.org>