PCIe: ASPM: Save/restore ASPM-L1SS controls in reverse order

Commit 54fdb1e4 ("PCIe: ASPM: Save/restore ASPM-L1SS
controls for suspend/resume") restores PCI_L1SS_CTL1, then
PCI_L1SS_CTL2. It should do those in the reverse order, since
the Enable bits are in PCI_L1SS_CTL1.  It also restores L1SS
state before we restore the PCIe Capability potentially enabling
ASPM as a whole. Fix the issue by changing order for both save
and restore.

Change-Id: I84e3db25b651b93dd4c037fa287f58edde90407a
Signed-off-by: Hemant Kumar <hemantk@codeaurora.org>