ANDROID: GKI: vmemmap and physvirt_offset is now gone for arm64 systems

In the 5.4.94 release we lost the following global symbols due to commit
7bc1a0f9 ("arm64: mm: use single quantity to represent the PA to VA
translation") being backported there:
	vmemmap
	physvirt_offset

So update the .xml file and the symbol lists to reflect the fact that
they are no longer with us anymore.

But, this removal doesn't show up in the summary file when rebuilding
the .xml file for some odd reason:

Leaf changes summary: 0 artifact changed
Changed leaf types summary: 0 leaf type changed
Removed/Changed/Added functions summary: 0 Removed, 0 Changed, 0 Added function
Removed/Changed/Added variables summary: 0 Removed, 0 Changed, 0 Added variable

Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Change-Id: I8fd99539575096e55374778d92f6d6ad3e282914