keeping adb server/daemon running causes dmesg PME spam every 1 second

[ghost]

Type: code issue

This is the dmesg spam when adb server(aka daemon) is running:

[ 1460.763742] pcieport 0000:00:1c.4: restoring config space at offset 0x2c (was 0x0, writing 0x0)
[ 1460.763748] pcieport 0000:00:1c.4: restoring config space at offset 0x28 (was 0x0, writing 0x0)
[ 1460.763752] pcieport 0000:00:1c.4: restoring config space at offset 0x24 (was 0x1fff1, writing 0x1fff1)
[ 1460.763813] pcieport 0000:00:1c.4: PME# disabled
[ 1460.763920] xhci_hcd 0000:03:00.0: PME# disabled
[ 1460.763928] xhci_hcd 0000:03:00.0: enabling bus mastering
[ 1460.770239] xhci_hcd 0000:03:00.0: PME# enabled
[ 1460.770377] xhci_hcd 0000:03:00.0: PME# disabled
[ 1460.770383] xhci_hcd 0000:03:00.0: enabling bus mastering
[ 1460.884813] xhci_hcd 0000:03:00.0: PME# enabled
[ 1460.884925] pcieport 0000:00:1c.4: PME# enabled
[ 1461.896751] pcieport 0000:00:1c.4: restoring config space at offset 0x2c (was 0x0, writing 0x0)
[ 1461.896764] pcieport 0000:00:1c.4: restoring config space at offset 0x28 (was 0x0, writing 0x0)
[ 1461.896772] pcieport 0000:00:1c.4: restoring config space at offset 0x24 (was 0x1fff1, writing 0x1fff1)
[ 1461.896863] pcieport 0000:00:1c.4: PME# disabled
[ 1461.897001] xhci_hcd 0000:03:00.0: PME# disabled
[ 1461.897014] xhci_hcd 0000:03:00.0: enabling bus mastering
[ 1461.903257] xhci_hcd 0000:03:00.0: PME# enabled
[ 1461.903477] xhci_hcd 0000:03:00.0: PME# disabled
[ 1461.903490] xhci_hcd 0000:03:00.0: enabling bus mastering
[ 1462.012901] xhci_hcd 0000:03:00.0: PME# enabled
[ 1462.013021] pcieport 0000:00:1c.4: PME# enabled
[ 1463.025739] pcieport 0000:00:1c.4: restoring config space at offset 0x2c (was 0x0, writing 0x0)
[ 1463.025751] pcieport 0000:00:1c.4: restoring config space at offset 0x28 (was 0x0, writing 0x0)
[ 1463.025760] pcieport 0000:00:1c.4: restoring config space at offset 0x24 (was 0x1fff1, writing 0x1fff1)
[ 1463.025844] pcieport 0000:00:1c.4: PME# disabled
[ 1463.025980] xhci_hcd 0000:03:00.0: PME# disabled
[ 1463.025992] xhci_hcd 0000:03:00.0: enabling bus mastering
[ 1463.032196] xhci_hcd 0000:03:00.0: PME# enabled
[ 1463.032313] xhci_hcd 0000:03:00.0: PME# disabled
[ 1463.032318] xhci_hcd 0000:03:00.0: enabling bus mastering
[ 1463.140830] xhci_hcd 0000:03:00.0: PME# enabled
[ 1463.140956] pcieport 0000:00:1c.4: PME# enabled

and it's happening every second unless either of the two devices are set to stay awake full time (via powertop). Details in this gist: https://gist.github.com/howaboutsynergy/35d0d2de2f7a692f874216887a9e4fcd

adb server/daemon is left running by utils/android-push.sh when it executes adb devices (or any adb command really)

I'll make a PR to adb kill-server iff the script utils/android-push.sh is the one that started it. Ergo, if adb server was already running(started by user, manually, for example) we do not kill it. (user wouldn't want that, for sure)