mips: switch to generic sigaltstack

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 2ac626a..a8a41e09 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -41,6 +41,7 @@
 	select HAVE_MOD_ARCH_SPECIFIC
 	select MODULES_USE_ELF_REL if MODULES
 	select MODULES_USE_ELF_RELA if MODULES && 64BIT
+	select GENERIC_SIGALTSTACK
 
 menu "Machine selection"