MIPS: Octeon: Remove SYS_SUPPORTS_HIGHMEM.

Only 64-bit kernels are supported, no need for SYS_SUPPORTS_HIGHMEM
Signed-off-by: NChandrakala Chavva <cchavva@caviumnetworks.com>
Signed-off-by: NDavid Daney <david.daney@cavium.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2988/Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/Kconfig

@@ -716,7 +716,6 @@ config CAVIUM_OCTEON_SIMULATOR
 	select DMA_COHERENT
 	select SYS_SUPPORTS_64BIT_KERNEL
 	select SYS_SUPPORTS_BIG_ENDIAN
-	select SYS_SUPPORTS_HIGHMEM
 	select SYS_SUPPORTS_HOTPLUG_CPU
 	select SYS_HAS_CPU_CAVIUM_OCTEON
 	select HOLES_IN_ZONE
@@ -732,7 +731,6 @@ config CAVIUM_OCTEON_REFERENCE_BOARD
 	select DMA_COHERENT
 	select SYS_SUPPORTS_64BIT_KERNEL
 	select SYS_SUPPORTS_BIG_ENDIAN
-	select SYS_SUPPORTS_HIGHMEM
 	select SYS_SUPPORTS_HOTPLUG_CPU
 	select SYS_HAS_EARLY_PRINTK
 	select SYS_HAS_CPU_CAVIUM_OCTEON