ipq40xx: 4.14: Sync kernel config

This patch syncs the 4.14 kernel config to the
current generic configuration.

Signed-off-by: Robert Marko <robimarko@gmail.com>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com> [reworded commit]

target/linux/ipq40xx/config-4.14

@@ -102,6 +102,7 @@ CONFIG_CPU_IDLE_MULTIPLE_DRIVERS=y
 CONFIG_CPU_PABRT_V7=y
 CONFIG_CPU_PM=y
 CONFIG_CPU_RMAP=y
+CONFIG_CPU_SPECTRE=y
 CONFIG_CPU_THERMAL=y
 CONFIG_CPU_THUMB_CAPABLE=y
 CONFIG_CPU_TLB_V7=y
@@ -281,6 +282,7 @@ CONFIG_MDIO_IPQ40XX=y
 CONFIG_MFD_SYSCON=y
 CONFIG_MIGHT_HAVE_CACHE_L2X0=y
 CONFIG_MIGHT_HAVE_PCI=y
+CONFIG_MIGRATION=y
 CONFIG_MODULES_USE_ELF_REL=y
 # CONFIG_MSM_GCC_8660 is not set
 # CONFIG_MSM_GCC_8916 is not set