Simple initial support for KVX MPPA

Adds the strict minimum to build a bare-metal toolchain for KVX MPPA
by providing custom git path to Kalray's github repositories.

config/arch/kvx.in

@@ -0,0 +1,11 @@
+# KVX specific config options
+
+## no-package
+## select ARCH_SUPPORTS_32
+## select ARCH_SUPPORTS_64
+## select ARCH_DEFAULT_64
+## select ARCH_REQUIRES_MULTILIB
+## select ARCH_USE_MMU
+##
+## help The KVX MPPA Processor architectures, as defined by:
+## help     http://www.kalrayinc.com

scripts/config.sub

@@ -1182,6 +1182,7 @@ case $cpu-$vendor in
 			| i370 | i*86 | i860 | i960 | ia16 | ia64 \
 			| ip2k | iq2000 \
 			| k1om \
+			| kvx \
 			| le32 | le64 \
 			| lm32 \
 			| m32c | m32r | m32rle \