ipq806x: add mangle bootargs options in config-4.4

Add config options to manage dual boot partitions, using MANGLE BOOTARGS

Signed-off-by: Adrian Panella <ianchi74@outlook.com>

target/linux/ipq806x/config-4.4

@@ -37,11 +37,13 @@ CONFIG_ARM_AMBA=y
 CONFIG_ARM_APPENDED_DTB=y
 CONFIG_ARM_ARCH_TIMER=y
 CONFIG_ARM_ARCH_TIMER_EVTSTREAM=y
-# CONFIG_ARM_ATAG_DTB_COMPAT is not set
 CONFIG_ARM_CCI=y
 CONFIG_ARM_CCI400_COMMON=y
 CONFIG_ARM_CCI400_PMU=y
 CONFIG_ARM_CCI_PMU=y
+CONFIG_ARM_ATAG_DTB_COMPAT=y
+CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_EXTEND=y
+# CONFIG_ARM_ATAG_DTB_COMPAT_CMDLINE_FROM_BOOTLOADER is not set
 CONFIG_ARM_CPU_SUSPEND=y
 CONFIG_ARM_GIC=y
 CONFIG_ARM_HAS_SG_CHAIN=y
@@ -249,6 +251,7 @@ CONFIG_LOCKUP_DETECTOR=y
 CONFIG_LOCK_SPIN_ON_OWNER=y
 CONFIG_LZO_COMPRESS=y
 CONFIG_LZO_DECOMPRESS=y
+CONFIG_MANGLE_BOOTARGS=y
 CONFIG_MDIO_BITBANG=y
 CONFIG_MDIO_BOARDINFO=y
 CONFIG_MDIO_GPIO=y