MIPS: Octeon: Disable CVMSEG by default on other platforms

QEMU can't emulate CVMSEG on generic platform for now.

Just disable it by default.
Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>

arch/mips/cavium-octeon/Kconfig

@@ -14,7 +14,8 @@ config CAVIUM_CN63XXP1
 config CAVIUM_OCTEON_CVMSEG_SIZE
 	int "Number of L1 cache lines reserved for CVMSEG memory"
 	range 0 54
-	default 1
+	default 0 if !CAVIUM_OCTEON_SOC
+	default 1 if CAVIUM_OCTEON_SOC
 	help
 	  CVMSEG LM is a segment that accesses portions of the dcache as a
 	  local memory; the larger CVMSEG is, the smaller the cache is.