config: android-recommended: enable CONFIG_CPU_SW_DOMAIN_PAN

Enable CPU domain PAN to ensure that normal kernel accesses are
unable to access userspace addresses.

Reviewed-at: https://android-review.googlesource.com/#/c/334035/

Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
[AmitP: cherry-picked this change from Android common kernel, updated
        the commit message and re-placed the CONFIG_STRICT_KERNEL_RWX
        config in sorted order]
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

kernel/configs/android-recommended.config

@@ -14,7 +14,7 @@ CONFIG_BLK_DEV_RAM=y
 CONFIG_BLK_DEV_RAM_SIZE=8192
 CONFIG_CC_STACKPROTECTOR_STRONG=y
 CONFIG_COMPACTION=y
-CONFIG_STRICT_KERNEL_RWX=y
+CONFIG_CPU_SW_DOMAIN_PAN=y
 CONFIG_DM_CRYPT=y
 CONFIG_DM_UEVENT=y
 CONFIG_DM_VERITY=y
@@ -107,6 +107,7 @@ CONFIG_SCHEDSTATS=y
 CONFIG_SMARTJOYPLUS_FF=y
 CONFIG_SND=y
 CONFIG_SOUND=y
+CONFIG_STRICT_KERNEL_RWX=y
 CONFIG_SUSPEND_TIME=y
 CONFIG_TABLET_USB_ACECAD=y
 CONFIG_TABLET_USB_AIPTEK=y