[PATCH] MIPS: Fix duplicate instances of ARCH_SPARSEMEM_ENABLE

[Kevin Cernekee <cernekee@gmail.com>]

"config ARCH_SPARSEMEM_ENABLE" exists in both arch/mips/Kconfig and
arch/mips/cavium-octeon/Kconfig, but the dependencies are not the same.
This results in warnings when a non-Cavium platform tries to select
ARCH_SPARSEMEM_ENABLE:

    $ make lemote2f_defconfig ARCH=mips
    warning: (LEMOTE_FULOONG2E && LEMOTE_MACH2F) selects ARCH_SPARSEMEM_ENABLE which has unmet direct dependencies (CPU_CAVIUM_OCTEON)
    warning: (LEMOTE_FULOONG2E && LEMOTE_MACH2F) selects ARCH_SPARSEMEM_ENABLE which has unmet direct dependencies (CPU_CAVIUM_OCTEON)
    #
    # configuration written to .config
    #

Proposed workaround is to use a Cavium-specific config option which
"select"s the desired options.

Signed-off-by: Kevin Cernekee <cernekee@gmail.com>
---
 arch/mips/cavium-octeon/Kconfig |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/mips/cavium-octeon/Kconfig b/arch/mips/cavium-octeon/Kconfig
index f9e275a..eda8266 100644
--- a/arch/mips/cavium-octeon/Kconfig
+++ b/arch/mips/cavium-octeon/Kconfig
@@ -82,8 +82,9 @@ config CAVIUM_OCTEON_LOCK_L2_MEMCPY
 	help
 	  Lock the kernel's implementation of memcpy() into L2.
 
-config ARCH_SPARSEMEM_ENABLE
+config CAVIUM_OCTEON_SPARSEMEM_ENABLE
 	def_bool y
+	select ARCH_SPARSEMEM_ENABLE
 	select SPARSEMEM_STATIC
 
 config IOMMU_HELPER
-- 
1.7.6.3