msm: 8960: Set last sleep mode variable for WFI

Set the last sleep mode variable correctly when
entering WFI sleep mode.

Change-Id: I68bbb09b46fe5d7229fbbc67f636294f0d9e92d6
Signed-off-by: Girish Mahadevan <girishm@codeaurora.org>
diff --git a/arch/arm/mach-msm/pm-8x60.c b/arch/arm/mach-msm/pm-8x60.c
index cc17ceb..cbe5201 100644
--- a/arch/arm/mach-msm/pm-8x60.c
+++ b/arch/arm/mach-msm/pm-8x60.c
@@ -1057,7 +1057,7 @@
 		msm_pm_retention();
 	} else if (allow[MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT]) {
 		per_cpu(msm_pm_last_slp_mode, cpu)
-			= MSM_PM_SLEEP_MODE_POWER_COLLAPSE_STANDALONE;
+			= MSM_PM_SLEEP_MODE_WAIT_FOR_INTERRUPT;
 		msm_pm_swfi();
 	} else
 		per_cpu(msm_pm_last_slp_mode, cpu) = MSM_PM_SLEEP_MODE_NR;