Remove ISL91301 from defconfig, PCIE power save

* ISL91301 seems to have issues with booting, disable until solved.
* Enable power save mode for PCIe ASPM.

Change-Id: I9df4510387da906b9d13dccc2c8a554516fd9c30
diff --git a/defconfig b/defconfig
index 52e91ef..c6dd7bf 100644
--- a/defconfig
+++ b/defconfig
@@ -26,4 +26,5 @@
 CONFIG_REGULATOR_BD71837=y
 CONFIG_MXC_CAMERA_OV5645_MIPI_V2=y
 CONFIG_SPI_IMX=y
-CONFIG_REGULATOR_ISL91301=y
+# CONFIG_REGULATOR_ISL91301 is not set
+CONFIG_PCIEASPM_POWERSAVE=y