GPU: Remove write to ifpo sysfs node.

As part of pa/2288829, this node becomes unsupported.

Prevents -ENOTSUPP errors when trying to write to Mali's ifpo sysfs
node.

Test: Boot to homescreen
Bug: 247571932
Change-Id: I0b579728a5b2a4355d648020113dda0592f904aa
Signed-off-by: Jeremy Kemp <jeremykemp@google.com>
1 file changed