ramips: re-enable highmem support for MT7621 now that it's fixed

Signed-off-by: Felix Fietkau <nbd@openwrt.org>

SVN-Revision: 48469

target/linux/ramips/mt7621/config-4.3

@@ -13,6 +13,7 @@ CONFIG_ARCH_SUPPORTS_UPROBES=y
 CONFIG_ARCH_SUSPEND_POSSIBLE=y
 CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
 CONFIG_BOARD_SCACHE=y
+CONFIG_BOUNCE=y
 CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_CEVT_R4K=y
 # CONFIG_CEVT_SYSTICK_QUIRK is not set
@@ -106,6 +107,7 @@ CONFIG_HAVE_OPROFILE=y
 CONFIG_HAVE_PERF_EVENTS=y
 CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
 CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
+CONFIG_HIGHMEM=y
 CONFIG_HW_HAS_PCI=y
 CONFIG_HZ_PERIODIC=y
 CONFIG_INITRAMFS_SOURCE=""
@@ -235,6 +237,7 @@ CONFIG_SYS_HAS_CPU_MIPS32_R2=y
 CONFIG_SYS_HAS_EARLY_PRINTK=y
 CONFIG_SYS_SUPPORTS_32BIT_KERNEL=y
 CONFIG_SYS_SUPPORTS_ARBIT_HZ=y
+CONFIG_SYS_SUPPORTS_HIGHMEM=y
 CONFIG_SYS_SUPPORTS_HOTPLUG_CPU=y
 CONFIG_SYS_SUPPORTS_LITTLE_ENDIAN=y
 CONFIG_SYS_SUPPORTS_MIPS16=y

target/linux/ramips/patches-4.3/0066-mt7621-enable-highmem.patch

+--- a/arch/mips/ralink/Kconfig
++++ b/arch/mips/ralink/Kconfig
+@@ -51,6 +51,7 @@ choice
+ 		select SYS_SUPPORTS_MULTITHREADING
+ 		select SYS_SUPPORTS_SMP
+ 		select SYS_SUPPORTS_MIPS_CPS
++		select SYS_SUPPORTS_HIGHMEM
+ 		select MIPS_GIC
+ 		select COMMON_CLK
+ 		select CLKSRC_MIPS_GIC